The 'mutants' in nature
In the natural world full of dangers, the ability to transform spectacularly of the following 'mutants' is indeed an effective 'way', ...12 wild animals in survival competition
The natural world is a fierce survival competition. And there, people admire extremely unique defenses of animals.Children start to be competitive from 4 years old
A new study finds that children start to be competitive from the age of 4, when they seriously play a game to win.