plumage

We know that humans once had thick fur! But for some reason we lose it.

Based on the study of evolution, we know that humans also had bushy fur. However, how they dissipate is still an unexplained unknown.

Ondatra zibethicus rats have strange abilities that make anyone who cares about them surprised.

A new study conducted by the University of Colorado at Boulder showed that sex hormones in male North American swallows skyrocketed during the breeding season when researchers