https://www.wired.com/story/slime-mold/

Last week, the internet got itself in a tizzy over a mysterious "blob" that a Paris zoo put on display. It has 720 sexes! It has no brain, yet it can learn! It doesn't have eyes or a mouth, but it can detect food and wolf it down!

It was in fact the slime mold Physarum polycephalum, a common, well-studied species. But the organism is even more fascinating than the zoo let on, because what we don't know about the slime mold is just as interesting as what we do.