There isn’t a one-size-fits-all answer for how often you should poop, but when it comes to what color your stool should be, expert consensus is much narrower. And deviations from it can be a ...

The two species of green anaconda look almost identical, and no obvious geographical barrier exists to separate them. But their level of genetic divergence — 5.5% — is staggering.

There isn’t a one-size-fits-all answer for how often you should poop, but when it comes to what color your stool should be, expert consensus is much narrower. And deviations from it can be a ...