A mysterious butterfly-shaped cloud spotted over St. Louis last week was built from actual butterflies.
Contest yields a stunning array of pictures of nature in action.
Butterflies come in an almost unimaginable number of colors -- whether taking flight or resting on a leaf, the showy insects deserve a showcase.
Long known for using a type of solar compass in the brain, the insects can also migrate when skies are overcast, suggesting a magnetic compass.
Tears are sort of like sports drinks, in that they contain various vitamins and minerals in a liquid solution. Continue reading →
Less-glamorous animals than elephants, gorillas and rhinos are poached for various reasons. Here's just a selection.
Female butterflies aren't interested in extra attention once they're pregnant.