Other

Is taxonomy a rigorous, objective...

Biology

What makes classifying dogs in breeds different from classifying humans in races? I thought that breed is different from race because unlike the...

Biology

I heard someone explaining that whales and dolphins are not fish because they were in fact mammals. As I understand it, once you are a mammal,...

Other

I understand survival of the fittest, but why would evolution allow animals to live in water but still need oxygen to...