The Sciences
Immortal Jellyfish; Is life without death achievable for humans?
To overcome death, start living again from the beginning. If the life secret of immortal Jellyfish, which has made the concepts of immortality and rebirth almost a reality, can’t human beings one day put dust in the eyes of death?
The secret of immortality has been floating in the ocean all this time, in the form of a jellyfish, while we sifted heaven and science to the ends of the earth for the art of defeating death. Turritopsis dohrnii, also known as the immortal jellyfish, survives death at some point in their lives. Imagine the butterfly turning back into a moth. Or a chicken turning into an egg again. Otherwise, an old man will age and become a fetus again. Although none of these things are happening, this jellyfish will revert to infancy when faced with death. Then will live once more. To know how it is, you need to know the life cycle of the jellyfish.
Turritopsis dohrnii, a member of the Hydrozoa family, prefers warm oceanic habitats. At the same time, they are also found in areas with cold water. They are believed to have originated in the Caribbean and Mediterranean seas. But in recent decades, they have spread to oceans around the world.
Maria Pia Miglietta, a professor of biology at the University of Notre Dame, describes this global spread of jellyfish as a ‘silent invasion’. They have come all over the world clinging to the bottoms of cargo ships. Due to their exceptional ability to survive, in the future there will be no situation in which only immortal jellyfish will exist in the oceans.

Their food is small insects in the sea and fish eggs. Turritopsis dohrnii is a very small creature, measuring only 4.5 mm in length and width. There are two stages in their life cycle. The hydroid stage, which grows and colonises through polyps, and the floating medusa stage. In general, everyone is more familiar with the jellyfish’s medusa stage form. A parachute-shaped figure with a balloon-like umbrella on top and fringes hanging down from it.
A jellyfish begins life as a larva called a planula. It is a very small cigar shaped one. They twist and float in the water to find a suitable place to cling to. If it sticks to one place, then the larva turns into a polyp. The polyp has the ability to clone itself. Thus, a colony of polyps is formed by self-replication. They can colonise the entire bottom of a canoe in days. If the conditions are right, the polyps will bloom and the baby jellyfish will emerge. This is where the medusa stage of the jellyfish life cycle begins.
Normally, the medusa of Hydrozoa species produces eggs and spores after they are fully grown. Fertilized ovules become planula. The planula again sticks somewhere and forms a hydroid colony. Polyps form from it and they produce more medusae. This is the typical life cycle of a jellyfish. After reproduction, the medusa will die.
Defeating death
The beginning of a jellyfish’s life is quite ordinary, but the end is quite extraordinary. When the medusa of the immortal jellyfish dies, it sinks to the ocean floor and begins to decompose. But then the miracle happens. From that the cells will be regenerated and thus they will come back to life. Not as new medusa or larvae. As polyps. New jellyfish will hatch from those polyps. This time, jellyfish skip the larval stage and start life as polyps.
Let the miracle of rebirth be there. What is the benefit of this to the jellyfish and why does it do this, these questions are more relevant here. Immortal jellyfish bring out this unique survival strategy and rebirth when faced with danger due to old age, illness, lack of food, or otherwise. Once this process begins, the umbels and fringes on the top of the jellyfish begin to die. It reverts to the polyp state and clings to any surface and comes back to life as a new jellyfish. Jellyfish can repeat this over and over again.
In 1988, Christian Sommer, a German student of marine biology, discovered this immortality of jellyfish completely by accident
How long can this jellyfish live? The answer is how long. These jellyfish were probably still in the oceans when the dinosaurs went extinct 66 million years ago. Biologically, a single immortal jellyfish can live for a long time without dying. Technically they can. But it has not been proved. Because the study of these jellyfish started after 1980s. So, we only have decades of knowledge about them. Moreover, if eaten by other creatures such as fishes, sea turtles, and other jellyfish, their lives will certainly end there.
Who discovered it?
In 1988, Christian Sommer, a German student of marine biology, discovered this immortality of jellyfish completely by accident. Sommer and another student, Giorgio Bavestrello, collected some hydrozoa, which they thought were turritopsis nutricula. Sommer kept the medusa in the lab and watched them until they emerged. Later he forgot about it. But a few days later, Sommer examined the jar in which they were stored and noticed something unusual. These jellyfish exhibit some unusual behaviours. Sommer couldn’t even imagine why that might be. In fact, it seemed to Sommer that they refused to die. A rare phenomenon that occurs backwards in life. They are getting younger and have reached their infancy. There it begins a new life cycle.
But even after a quarter of a century since Christian Sommer made that great discovery, we still haven’t been able to find the secret of the immortal jellyfish’s reincarnation
At the time, Sommer did not realize the significance or magnitude of his discovery. It was only after a century that the name immortal Jellyfish was given to this species. Sommer’s discovery was taken up by biologists. They learned more about this species. Several experimental observations were made. And, in 1996, they published their study under the name ‘Reversing the Life Cycle’. In the study, they explained how this category of jellyfish reverts to the initial polyp stage at some point in their growth. Thus, they escape death and attain immortality, a research paper on the topic says. The discovery challenged the world view that once born there is death.

Can that secret make man immortal?
To overcome death, start living again from the beginning. If the life secret of immortal Jellyfish, which has made the concepts of immortality and rebirth almost a reality, can’t human beings one day put dust in the eyes of death? Should be. Damaged cells in the body can be repaired and regenerated. It can be very crucial in treating and curing deadly diseases like cancer. But even after a quarter of a century since Christian Sommer made that great discovery, we still haven’t been able to find the secret of the immortal jellyfish’s reincarnation.
Immortal jellyfish and some other members of this genus put life into reverse gear when faced with environmental stressors or physical shocks. During this time, a process called cellular transdifferentiation takes place in the organism. It is an unusual phenomenon in which one type of cell changes into another (for example, a skin cell becomes a nerve cell). When this happens, cells produced by cell division change in shape, characteristics, and functions, and they become like sperm cells. In jellyfish, all cells of the medusa stage become cells of the polyp stage. Then the body structure itself changes completely. As seen in the movies. This process is called ontogeny reversal and inverted metamorphosis. An abnormal deviation in the normal life cycle. Each cell contains the information needed to build an organism as a whole. But only a part of this information is used by the jellyfish for ‘rebirth’. Understanding the molecular mechanism in jellyfish that causes ontogeny reversal, instructing all cells to return to infancy, could be the first step towards the ever-greater human goal of ‘immortality’.
Society
When Pollinators Vanish, Children Go Hungry—Here’s the Proof
A landmark study has, for the first time, traced a direct line from the collapse of wild insect pollinators to the malnutrition and poverty of farming families — reframing biodiversity loss as a global public health emergency.
Two billion. That is how many people on this planet eat what smallholder farmers grow. Not what agri-industrial combines harvest, not what commodity markets trade — what families with small plots of land pull from the soil, season after season, with the tools and seeds and knowledge they have. Two billion people. And a significant share of what keeps those harvests coming, what puts vitamins into the food and income into the household, has no name on any payroll, files no tax return, and has never once been thanked.
It is insects. Wild insects — bees, hoverflies, moths, beetles — moving flower to flower across millions of smallholder fields, doing work that no machine replicates and no subsidy replaces. Pollinator decline is dismantling that system quietly, field by field, season by season. A study published today in Nature, led by researchers at the University of Bristol, has for the first time traced exactly what that loss costs — not in abstracted ecosystem valuations, but in the vitamin A missing from a child’s diet, in the folate a pregnant woman never gets, in the farm income that does not arrive at the end of a harvest. The number at the end of that calculation is not a projection or a model. It is a measurement. And it is arresting.
Insect pollinators, the study found, are responsible for 44% of the farming income of the households tracked, and contribute more than 20% of dietary intake of vitamin A, folate and vitamin E — three nutrients whose deficiency is already linked to stunted child growth, weakened immunity and higher rates of disease. When pollinators vanish, the families don’t just grow less food. They grow less nutritious food, earn less money and become more vulnerable to illness. The cycle reinforces itself, downward.

Ten Villages, One Year, and a Chain of Evidence
The study centred on ten smallholder farming villages and their surrounding landscapes in Nepal. Over the course of a year, the research team — drawn from universities and non-governmental organisations across Nepal, the United Kingdom, the United States and Finland — tracked three things simultaneously: which insects were visiting which crops, what those crops yielded and how nutritious they were, and what the farming families were actually eating and earning.

It is, in structural terms, the kind of study that is very hard to pull off. Most research on pollinators stops at the field boundary — counting bee visits, measuring fruit set, estimating yield differentials. This one kept going, all the way to the dinner table and the household ledger. That continuity of evidence is what makes it significant.

The picture that emerged was not abstract or statistical. It was human. Over half the children in the study villages were too short for their age — a condition that goes by the clinical name of stunting and signals not just poor growth but compromised brain development, reduced immunity and diminished life prospects. The underlying cause, as the researchers documented it, was diet. And that diet depended, in ways the families could not easily see or control, on the insects working their fields.

Pollinator Decline: The Hidden Hunger Nobody Is Counting
There is a term in public health circles for the condition that the Nepal families illustrate: hidden hunger. It describes not the obvious, acute starvation that makes headlines, but the chronic, silent insufficiency of vitamins and minerals that undermines health even when enough calories are being consumed. A quarter of the global population currently suffers from it. It is, by most measures, one of the largest sources of preventable illness on the planet, and it is almost entirely invisible in the way society keeps score of environmental damage.
When a species goes extinct, when a forest is cleared, when an insect population crashes — the accounting of loss is typically measured in biodiversity metrics, in ecosystem service valuations, or in the emotional register of what is no longer there to see. It is almost never measured in folate deficiency, in children’s height-for-age charts, in the likelihood of a farming family falling into debt after a bad harvest.
That is what this study changes. It is not the first to establish that pollinator decline matters for nutrition in the abstract. But it is the first to demonstrate, with tracked data from real communities over a real year, the size and mechanism of the effect — and to show that the effect flows not just through calories but through the specific micronutrients that are hardest to replace.

Biodiversity as Medicine
Planetary Health — the field Dr Myers directs at Johns Hopkins — proceeds from a deceptively simple premise: human health and ecological health are not separate subjects. They are the same subject, studied from different ends. The degradation of natural systems is not a background condition to human development; it is one of the primary mechanisms by which human health is undermined.
That claim has long had intuitive force. What the Bristol study on pollinator decline provides is something more demanding: empirical evidence at the household level. It is one thing to argue that biodiversity loss will eventually compromise food security in a generalised way. It is another to show, village by village, season by season, that the decline in the bee community visiting a particular set of crops reduces particular vitamins in particular families’ diets by a measurable amount.

The phrasing matters. Biodiversity is not a luxury. In policy conversations, the language of luxury — or alternatively, of long-term concern — has frequently served to push ecological questions down the agenda. If the relationship between pollinator health and child health is as direct as this study finds, that framing becomes harder to sustain.
What Goes When the Bees Go
It is worth being specific about the nutritional stakes. Vitamin A deficiency impairs vision, particularly in low light, and compromises the immune system’s ability to fight infections that would otherwise be routine. Folate deficiency during pregnancy causes neural tube defects in developing foetuses, among other effects. Vitamin E is a key antioxidant, and its deficiency is associated with neurological damage and weakened immune function. These are not marginal health concerns. They sit near the top of the global burden of preventable disease.
The crops most dependent on animal pollination — fruits, many vegetables, pulses — are also, not coincidentally, among the most concentrated sources of these particular nutrients. A diet from which pollinator-dependent produce has been reduced or removed can look adequate in calorie terms while being profoundly inadequate in micronutrient terms. The families studied in Nepal were, in effect, already living that deficit, in a context where pollinator diversity is declining.
Globally, insect populations have been under sustained pressure for decades. Pesticide use, habitat loss, monoculture farming, climate change and artificial light at night have all been implicated in declines that researchers have called, in some cases, ecological collapse. The mechanisms are various; the direction of travel is consistent.
The Good News: Reversible by Design
The research is, in its implications, genuinely alarming. But the researchers are also at pains to emphasise something that is easy to miss in the headline findings: the relationship between pollinators and nutrition runs in both directions. If pollinator decline causes nutritional harm, pollinator recovery can produce nutritional gains. And the actions required are not exotic.
Planting wildflowers at field margins. Reducing pesticide inputs. Keeping native bee colonies. These are the kinds of changes that do not require new technology or large capital investment. They require farmers to understand what is happening in their fields at a level of detail most have not previously been given reason to consider. The researchers are already working on that — translating their findings into practical guidance and working with local organisations, government partners and farmers in Nepal to implement changes on the ground.
The approach is now informing Nepal’s emerging National Pollinator Strategy, an effort to make pollinator-friendly practices a standard part of everyday agriculture rather than a specialist conservation concern. The researchers report that farmers who have adopted even modest changes are already seeing improvements in crop yields, income and nutrition — a feedback loop that runs in the direction of health rather than away from it.

A Framework That Travels
Nepal is not an isolated case. Two billion people around the world depend on smallholder farming. Many of them face the same combination of circumstances: high dependence on pollinator-sensitive crops, limited dietary alternatives, micronutrient deficiencies that are already entrenched and ecosystems under stress. The findings from ten Nepali villages do not translate automatically to every agricultural context, but the framework — the method of tracing connections from insects to income to nutrition — does.
Diets even in industrialised countries still depend on pollinators and the ecosystems that sustain global agriculture. The buffer of wealth — the ability to import, substitute, supplement — is larger in wealthy countries, but it is not unlimited, and it does not protect the most economically vulnerable people even within those countries.
The lesson from this research on pollinator decline is less a specific warning about Nepal and more a methodological call to arms: to start measuring the connections that have, until now, been assumed or asserted but rarely demonstrated. When those connections are demonstrated, the case for protecting what remains of insect diversity becomes something different — not a moral preference or an aesthetic value, but a documented precondition for human health.

The Stakes
A quarter of the world’s people are living with hidden hunger. Over half the children in ten Nepali villages are stunted. Forty-four percent of the farming income in those communities flows, invisibly, through the wings of insects that nobody counted or protected until researchers started looking. The insects are in decline.
The study’s authors are careful, as scientists should be, to describe what they found and what it implies rather than what must be done. But the shape of the implication is not obscure. The fabric of life — the phrase Dr Myers uses — is not an abstraction. It is the thing that puts vitamins in a child’s diet and money in a family’s pocket. Tear large enough holes in it, and the consequences are not primarily ecological. They are medical. They are economic. They are, in the most direct sense, human. That’s why the new findings on pollinator decline matter.
The bees were always doing the work. We just weren’t watching closely enough to see it — or to understand what we stood to lose.
Society
Lost in Your Twenties? You’re Not Behind—You’re Becoming
Feeling lost in your twenties? You’re not behind—you’re becoming. Here’s why confusion, doubt and delay are part of growth.

The quarter-life crisis is one of the most widely felt yet least talked-about experiences of early adulthood. Two psychologists explain why the pressure to have everything figured out is making an already difficult decade harder – and how self-compassion could be the most important skill a young person develops.
In recent years, conversations about mental health have become more visible, yet one experience faced by many young adults often remains unspoken: the quarter-life crisis. Across universities, workplaces, and homes, many individuals in their twenties quietly struggle with feelings of uncertainty about their future. They may have completed their education, secured a job, or be actively searching for one, yet a persistent question lingers: Is this the life I really want?
What many describe as a quarter-life crisis is often this exact feeling—uncertainty, comparison, and the quiet fear of falling behind. It’s a phase increasingly common among young adults, where expectations collide with reality, leaving many questioning their choices, direction, and sense of purpose.
The twenties have long been viewed as a time of opportunity, exploration, and independence. However, for many young adults today, this stage is also marked by intense pressure. Decisions about career paths, financial stability, relationships, and personal identity often converge during this period. At the same time, social comparisons — particularly through social media — can create the impression that everyone else seems to have their lives perfectly planned.
What Is a Quarter-Life Crisis, Really?
A quarter-life crisis isn’t just “being dramatic.” It is a period of uncertainty and emotional stress marked by feeling stuck or directionless, comparing yourself constantly to others, doubting your choices, anxiety about the future, and the pressure to have it all figured out. In a world where everyone seems to be thriving online, it is easy to feel like you are the only one struggling. But behind those curated posts, many are just as confused.

Psychologists describe this as a phase of emotional and psychological uncertainty that typically occurs in early adulthood. Unlike the widely discussed mid-life crisis, the quarter-life crisis often emerges when individuals are expected to transition into stable adult roles. The pressure to make the “right” decisions about career, relationships, and life direction can make this period particularly stressful. While these challenges can feel overwhelming, psychological research suggests that certain factors can help young adults navigate this phase more effectively.
Why Are We So Hard on Ourselves?
When things don’t go as planned, most of us turn inward with criticism.
“I should be doing better.” “I’m already behind.” “Everyone else has their life together.”
This inner voice can be harsh, unforgiving, and exhausting. And instead of helping, it makes the crisis feel heavier. That is where self-compassion comes in.
Self-Compassion: The Skill No One Taught Us
Self-compassion is not about being lazy or making excuses. It is about treating yourself with the same kindness you would offer a friend. Think about it: if your friend said they felt lost, would you tell them they were a failure? Probably not.
Psychologist Kristin Neff identifies three elements at the heart of self-compassion: self-kindness — being gentle with yourself instead of critical; common humanity — recognising that struggle is part of being human; and mindfulness — acknowledging your feelings without overreacting. It is not about ignoring your problems; it is about facing them without tearing yourself down.

How Self-Compassion Helps During a Crisis
When you practise self-compassion, something shifts. Instead of panicking, you pause. Instead of judging, you understand. Instead of spiralling, you ground yourself.
Research shows that people who are more self-compassionate experience lower anxiety and stress, better emotional resilience, greater clarity in decision-making, and improved overall wellbeing. Self-compassion does not solve a crisis overnight — but it changes how you go through it.
Small Ways to Be Kinder to Yourself
You do not need a complete life overhaul. Start small. Change your inner dialogue: replace “I’m failing” with “I’m figuring things out.” Take breaks without guilt — rest is productive too. Limit comparison; social media shows highlights, not reality. Celebrate small wins, because progress is not always loud. And ask for help. You do not have to do this alone.
A quarter-life crisis can feel like everything is falling apart. But sometimes, it is actually everything falling into place — just not in the way you expected. In the end, a quarter-life crisis is not a sign that you are failing. It is a sign that you are evolving, and with self-compassion, you can navigate this uncertainty with greater strength, clarity, and trust in your own journey.
Reference
>> Neff, K. (2003). Self-Compassion: An Alternative Conceptualization of a Healthy Attitude Toward Oneself. Self and Identity, 2(2), 85–101.
>> Robinson, O. C. (2019). A Longitudinal Mixed-Methods Case Study of Quarter-Life Crisis During the Post-university Transition: Locked-Out and Locked-In Forms in Combination. Emerging Adulthood, 7(3), 167–179. Scopus.
Glenda Fernandes is a researcher at Christ (Deemed to be University), Bangalore, with a focus on the psychological experiences of young adults, including quarter-life crisis, meaning in life, and self-compassion. Dr. Aiswarya V R is Assistant Professor at Christ (Deemed to be University), Bangalore, specialising in health and developmental psychology. She holds an MSc in Applied Psychology from the University of Calicut and a doctorate in Child Psychology from the University of Kerala.
The Sciences
Scientists Crack the Genetic Code Behind Seedless Grapes
Indian researchers reveal how genetic mutations create the popular seedless varieties consumers love, opening doors to better grape breeding
Scientists have finally unlocked the mystery behind one of our favourite fruit features – seedless grapes. A study by Indian researchers has decoded the genetic mechanisms that create seedless grapes, potentially revolutionizing how we breed these popular fruits.
The Science Behind Seedless Success
The research, led by Dr. Ravindra Patil at the Agharkar Research Institute (ARI) in Pune, India, examined why some grapes develop without seeds while others don’t. Published in BMC Plant Biology, the study focused on a seedless mutant derived from the high-yielding grape variety ARI-516.
Using advanced genomic tools, the team discovered that pollen sterility is the key culprit behind seedlessness. The seedless grapes showed:
- Abnormal pollen structure with very low viability
- Complete inability of pollen grains to germinate
- Smaller female reproductive structures compared to seeded varieties
- Disrupted fertilization processes leading to seedless berry formation
Genetic Detective Work
The researchers employed cutting-edge techniques to crack the code:
Transcriptomic Analysis: RNA sequencing revealed that genes crucial for pollen development, cell division, and hormone signaling were significantly “switched off” in seedless varieties.
Whole-Genome Sequencing: This identified multiple insertion-deletion mutations (InDels) in genes responsible for pollen development, essentially breaking the normal seed formation process.
The evidence points to parthenocarpy – a natural process where fruits develop without fertilization due to reproductive defects.
Why This Matters
This discovery isn’t just academic curiosity. Seedless grapes represent a massive global market, with consumers strongly preferring them for:
- Fresh consumption
- Raisins and dried products
- Juices and processed foods
The research provides molecular markers that grape breeders can use to:
- Develop new seedless varieties faster
- Improve fruit quality and yield
- Create grapes better adapted to different climates
Impact on Agriculture
Dr. Patil’s team has conducted one of the most comprehensive studies on grape seedlessness using modern genomic tools. This breakthrough could significantly accelerate breeding programs worldwide, benefiting both grape growers and consumers who enjoy these convenient, seed-free fruits.
The study represents a perfect example of how understanding nature’s genetic mechanisms can lead to practical agricultural improvements, potentially transforming grape cultivation and meeting growing global demand for high-quality seedless varieties.
The research was conducted in collaboration with Savitribai Phule Pune University and represents a significant advancement in horticultural genomics.
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