The atomic Christmas tree was created in the laboratory of the Delft University of Technology. Maura Willems, a physics student, decided to create the smallest Christmas tree in the world. The Christmas tree is made of just 51 atoms and is 4 nanomers tall. Human hair is a giant with it, because it is as much as 40,000 times narrower than it.
Interestingly, the latest research indicates that we once had it, although we were not the best at it. When a bear wakes up from hibernation, its bones and muscles are practically the same as when it went to sleep, because its body has learned not to eat itself. Instead, a specialized metabolic process comes into play that protects the animals during a prolonged nap, provided they have sufficient supplies in advance. If they fail to do so, they must take into account that hibernation may end badly - rickets, hyperparathyroidism or bone dystrophy are some of the possibilities that, according to the researchers, could also have happened to our ancestors falling asleep for the winter.