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 ...

A monarch butterfly (Dannaux plexippus) flaps its wings in Piedra Herrada Sanctuary, Mexico. Might this start a chain of events that results in a tornado in Texas? Photograph by Jaime Rojo In 1961, ...

In March 2021, social media users received an ample dose of cuteness when a video supposedly showing a puppy playing with a butterfly went viral: As this video racked up millions of views (and ...

You've probably heard of the ‘butterfly effect’ from the 2004 American sci-fi movie featuring young Ashton Kutcher. But the term stems from the branch of math called chaos theory and is actually ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

For the first time, engineers have created a model that flies just like a real butterfly. Powered only by an elastic band, it flits up and down and flaps its wings languidly – just like the ...

In April 2019, an image supposedly showing an "endangered starry butterfly" was widely circulated on social media. One post from the Facebook page Earth Wonders, for instance, racked up more than ...