00:00In 2021, while drilling about 11 feet beneath the surface of permafrost in northeastern Siberia,
00:07researchers uncovered a 24,000-year-old frozen life form.
00:12And then, they brought it to life, before cloning it, or better said, it cloned itself.
00:20This might sound like the beginning of a sinister horror story, but don't worry, it's actually quite the opposite.
00:26What scientists unearthed was a microscopic frozen organism that could fundamentally reshape what we think about evolution and survival.
00:35The uncovered tiny creatures are called bedelloid rotifers,
00:40microscopic animals with little wheel-like mouths that they use both for moving and feeding.
00:46They were first discovered in 1696 and are fairly common in freshwater environments around the world, with a few saltwater species.
00:54They might seem unremarkable, but scientists have been studying them since early microscopes made it possible to actually see them.
01:01Because even though there are only a few dozen microns wide, they're surprisingly complex, with brains, guts, muscles, and reproductive systems.
01:12Could it be that within that complexity lies the secret to ultimate resilience?
01:17Maybe even for us humans?
01:20Let's break it down.
01:21These creatures are extremophiles.
01:24That means they can survive being completely drained of water at any point in their life cycle, then lie dormant until rehydrated.
01:32But that's not all.
01:34They can also persevere through some of the harshest conditions on Earth, or in outer space,
01:39or even being stuck in the Siberian permafrost wasteland for tens of thousands of years.
01:46This is possible because they can enter cryptobiosis, a condition where organisms pause their metabolism and become nearly inactive.
01:55It may sound science-y, but actually, some of the everyday products we eat are stored in a fridge thanks to this phenomenon.
02:04Take yeast, for example.
02:06Live yeast cells are surrounded by a protective layer made of dead cells and some nutrients.
02:11You can keep yeast at room temperature, but if cryptobiosis comes into play in the form of your fridge or freezer, it stores much better and longer.
02:22During cryptobiosis, rotifers accumulate protective compounds like chaperone proteins, which help them repair and recover once favorable conditions return.
02:34Chaperone proteins are like tiny bodyguards.
02:38Their job is to keep other proteins in the cell from falling apart under pressure.
02:42When the body is stressed, whether from heat, cold, toxins, dehydration, or just the natural aging process, the proteins inside our cells can start to misfold.
02:54Proteins need to be folded into very specific shapes to function properly, and when that structure breaks down, they become useless, or worse, harmful.
03:04Misfolded proteins can pile up and interfere with normal cell function.
03:08In some cases, they clump together in ways that poison the cell.
03:13This kind of damage is even linked to serious health conditions.
03:18So, if rotifers have developed powerful proteins that prevent cellular chaos even under extreme conditions,
03:25could we use them to protect human cells from diseases and aging?
03:29By analyzing the age of the ice they were found in, scientists figured out that these frozen rotifers were at least 24,000 years old.
03:40That's a huge leap from earlier studies, which showed they could survive frozen for only about 10 years.
03:47Now, that's what you call record-breaking.
03:49This period of Earth's history is known as the Late Pleistocene Epoch, a time dominated by the Ice Age,
03:57which means these invertebrates were lying dormant when Manny and Cid were having their adventure while roaming the icy landscapes,
04:04along with saber-toothed cats and giant ground sloths.
04:07Fun fact!
04:10Although animated movies like Ice Age show woolly mammoths as huge, towering giants,
04:15they were actually about the same size and weight as today's average African elephant.
04:21Nature and evolution can be so cruel, yet fascinatingly unpredictable.
04:26Massive, menacing beasts that came from the Ice Age couldn't survive it,
04:30yet something tiny and weird, like a bedelloid, could.
04:34But, regarding our unfrozen creature,
04:39after the soil thawed, the organism didn't just begin moving again,
04:43it also started reproducing.
04:45This is thanks to an ability called parthenogenesis,
04:49a specific form of reproduction in which embryos develop from unfertilized eggs,
04:54allowing them to reproduce independently.
04:57It really is like cloning, but it happens naturally.
05:00Many organisms, such as certain insects, reptiles, and even some birds,
05:05are capable of parthenogenesis, at least under specific conditions.
05:10For example, in honeybees, males develop from unfertilized eggs through parthenogenesis,
05:16making them genetic copies of their mother.
05:19However, parthenogenesis is often seen as an evolutionary disadvantage
05:23because it limits genetic diversity,
05:26meaning that most species that reproduce this way eventually face extinction.
05:32Despite this, bedelloid rotifers have diversified into over 450 distinct species over millions of years,
05:40which is extremely rare.
05:43Scientists believe their survival comes down to a few evolutionary adaptations.
05:47They can pause their metabolism through cryptobiosis,
05:51repair their DNA with specialized proteins,
05:54and even borrow useful genes from other organisms,
05:58using a process called horizontal gene transfer.
06:02Unlike most animals, which rely solely on inherited DNA,
06:07these organisms can steal genetic material from bacteria, fungi, and even plants,
06:12splicing foreign genes into their genome to gain new survival traits.
06:18Some studies have shown that up to 10% of their active genome comes from foreign DNA.
06:23This could explain their extraordinary resilience.
06:26They borrow genes for stress resistance, toxin breakdown, or radiation repair,
06:31essentially patching and upgrading their DNA in real time.
06:37It's not like the mind flayer from Stranger Things
06:40where the creature absorbs another organism to improve itself and grow.
06:44It's more like a spy stealing a blueprint from a rival lab to learn its secrets.
06:50When cells rupture, for example, when bacteria die nearby,
06:53bedelloids scoop up loose DNA fragments and integrate them into their own genome.
06:58Interestingly, the usual expected lifespan of bedelloid rotifers,
07:02under normal circumstances, is only two weeks.
07:05The soil sample that contained these rotifers also held nematodes, or roundworms,
07:12another group of tiny survivors already known to withstand tens of thousands of years icebound.
07:19This isn't just limited to microscopic animals.
07:23Researchers have successfully regrown Antarctic moss and entire campion plants
07:28from seeds and samples frozen for hundreds or even thousands of years.
07:32In 2016, a team of Japanese scientists brought tardigrades, or simply water bears,
07:38back to life after 30 years in cryptobiosis.
07:42Tardigrades are even more impressive because they can live in a suspended state for up to 30 years,
07:48without food or water, and with temperature swings from deep freeze to 300 degrees Fahrenheit.
07:54These guys can also endure crushing deep-sea pressures, vacuum, microgravity, and intense radiation of space.
08:03Remember when we said earlier that these species can survive the harshest conditions on Earth and beyond?
08:09It wasn't an exaggeration, and now you understand why.
08:14And it's exactly why NASA and its partners sent water bears and bedelloid rotifers into orbit.
08:19They've even been aboard the ISS, helping scientists understand how these animals handle microgravity, radiation, and stress.
08:29Not only that, but in 2007, the European Space Agency launched a bunch of tardigrades into low Earth orbit,
08:36completely exposed, no suit, no shield, floating in a vacuum.
08:40They were blasted by cosmic radiation, UV light 1,000 times stronger than what hits Earth's surface,
08:47and temperatures near absolute zero.
08:50And when they came back, most of them woke up,
08:53and reproduced despite the harsh conditions they were exposed to.
08:58This ties into an old theory called panspermia,
09:02the idea that life didn't originate on Earth but arrived here,
09:06locked in space dust or trapped inside a meteorite.
09:09Before, maybe it sounded like a fringe science,
09:13but when organisms can brush off cosmic radiation,
09:16then it doesn't seem so far-fetched, does it?
09:19What about humans?
09:20Does this mean we now fully understand the way hibernation works
09:24and are close to putting humans in this state?
09:27Sorry for spoiling it for you, but it still feels more like science fiction.
09:32However, researching rotifers, water bears, and similar organisms
09:35can lead to massive breakthroughs in other fields.
09:38Their resilience might be a blueprint.
09:41A blueprint for medicine.
09:43For reshaping what it means to age.
09:45Maybe even to pause life itself.
09:48Or extend it.
09:49We're talking real, practical innovations.
09:52From better preservation of human organs for transplantation,
09:55to drugs that slow aging at the cellular level.
09:59And yes, maybe even cryogenic hibernation,
10:02long enough to make interstellar travel possible.
10:04That's it for today.
10:08So hey, if you pacified your curiosity,
10:10then give the video a like and share it with your friends.
10:12Or if you want more, just click on these videos
10:15and stay on the bright side.
Comments