Many bird-of-paradise species have evolved colorful plumage - a result of special eating habits and behaviors.
Unfortunately, evolution often detours along a crooked path until species become more "fit" for their environments.
One of the most impressive feats of muscular coordination in nature is the very common instance of a frog darting out its tongue in order to catch a fly.
A study on elephant memory shows that having a strong memory helps elephants survive in the wild.
If a minnow's skin is damaged by an attacking pike, it releases a chemical that attracts more pike. Why would a minnow want to attract more trouble?
Isn't it amazing that dog breeds like the Chihuahua and the Great Dane can vary so much in size, yet be the same species?
The flowers of Rafflesias are the largest in the world. But the rest of the plant is minuscule and has no leaves, roots or stems.
Whales must have evolved from some other larger, ancient creature, right? However, sometimes evolution takes unexpected twists.
In most species, the females die once they hit menopause and no longer reproduce. Why do human females live long after they're no longer able to have children?
You appear to turn down fatty foods with a stoical disregard, when nobody is looking you dive into a deep-dish pizza. It's okay, everyone does this, but why?