“There were mammals alive at the same time and place as T ... the nectar of our numerous flowering plants—in fact, these things co-evolved so that birds would disperse the plants’ seeds.

An animated sequence that shows the key differences between living things, dead things and things that have never been alive. In a park setting, we see birds, trees and rabbits. The commentary ...

Trees are living things. Dogs, cats, fish, snakes, bees and people are also living things. Dry leaves on the ground are dead, but they were once part of a living tree. Bones were once part of a ...