Sponge colors serve a purpose beyond aesthetics. Here's what each color indicates and why learning the differences can keep you from getting sick.

Once used by Nazis to label gay men, the pink triangle was reclaimed in the 1970s and reborn as an era of queer resistance.

Octopuses, squids, cuttlefish and other animals in the cephalopod family are well known for their ability to camouflage, changing the color of their skin to blend in with the environment. This ...