“I'm sure we're going to find out one day that the brain is as worthless as the appendix.” —Scott McClanahan The poor, maligned appendix. That worm-like accessory dangling from our intestines has long ...

We used to treat the appendix as a useless leftover, but fresh research is changing how we see it. As it turns out, it might play a serious role in how your gut and immune system stay healthy. Here’s ...