Remember, squid ink leaves stubborn stains, so it pays to be extra cautious. If the ink sac breaks and you do get stained, it's not the end of the world.

The ink sacs belonged to a cephalopod, the group that includes squid, octopus and cuttlefish, 160 million years ago, during the Jurassic era.

Scientists have found that two ink sacs from 160-million-year-old giant squid fossils discovered 2 years ago in England contain the pigment melanin, and that it is essentially identical to the ...