You come across a post with an image of a broken heart that reads "s(he) be(lie)ve(d)." It's the deepest ... more extra selves, this meme is a perfect time capsule of '00s internet culture.

A first-of-its-kind experiment tracking fruit fly behavior in a natural setting challenges 40 years of assumptions about circadian clocks. The research, published today (April 4) in Nature, suggests ...