Small animals wake up after 30 years of hibernation!



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Small animals wake up after 30 years of hibernation!

Incredible but true: small animals with a peculiar appearance and a little alien thawed after being hibernated for more than 30 years in the ice of Antarctica. They are the tardigrade, which, after thawing, began to reproduce normally.

they would be gifted in a DNA in which many genes come from other species, such as primitive bacteria, fungi and plants. The tardidradi are a tenth of a millimeter long: they were found together with an egg inside ice samples taken in Antarctica in November 1983, thawed more than 30 years later in the laboratory.

The two animals took about 2 weeks to fully awaken and one of them then laid 19 eggs, which almost all hatched. Even the egg found has resisted hibernation, leading to the birth of a new individual. Hibernation would not seem to have caused damage to these small animals, already known to the world of research for their incredible resistance to hostile environments of all kinds, even to pressures close to zero and the radiation of space.

The secret of the resistance of water bears could be hidden in the DNA and the next step of the Japanese researchers will now be to analyze it, to try to understand what mechanisms have developed to repair the genetic damage due to hibernation.

Polar bears may disappear in the 2100

Polar bears could become extinct by 2100. These are the conclusions of a study published in Nature Climate Change. This study highlights that if we didn't stop climate change, polar bears could run out of food and die.

The main author of the study is Peter Molnar and analyzed 80% of the total polar bear population. These data have been compared with those deriving from possible future projections on ice by 2100, if we keep the same CO2 production, this will be the result.

With the reduction of ice, bears will have to fast surviving with only the accumulated fat. They would die of hunger, given the extreme difficulty in finding food. This could lead them to the brink of extinction, leaving them only in the northernmost area of ​​the Arctic.

When fasting bears are used to not moving or doing it as little as possible in order to save energy. The reduction of ice will also lead to a drastic drop in the population. The time it takes for bears to find a mate will lengthen, which will cause these animals to move despite fasting, burning energy unnecessarily.

The fate of polar bears has long been predicted and used as a warning to remember what the effects that human-caused climate change could bring. Critics who don't believe in climate change claim that fear of polar bear extinction is exaggerated as they have been able to survive despite high temperatures and food shortages.

Obviously, scientists don't accept this argument. Their answer is that in all likelihood, bears had access to alternative sources of food in previous hot periods, which no longer occurs.