Add Yahoo as a preferred source to see more of our stories on Google. A monarch butterfly (Dannaux plexippus) flaps its wings in Piedra Herrada Sanctuary, Mexico. Might this start a chain of events ...

For a creature that weighs as much as a paper clip, one of the world’s tiniest and most determined migrants is literally the ...

A new study warns that global climate change may have a devastating effect on butterflies, turning their species-rich, mountain habitats from refuges into traps. Think of it as the 'butterfly effect' ...

Is the 2004 Ashton Kutcher vehicle The Butterfly Effect a good movie? Definitely not, no—but try telling that to me at age thirteen. And then wrap your head, once more, around the fact that if you had ...

The butterfly effect is a concept first popularized in the 1960s by a mathematician and meteorologist named Edward Lorenz. It essentially holds that the mere fluttering of a butterfly's wing can lead ...