The ink's been dry for 160 million years—but scientists have for the first time confirmed pigment in two fossilized ink sacs from cuttlefish-like animals, a new study says. The ancient ink's similarity to modern squid ink suggests this defensive weapon hasn't evolved much since the Jurassic period. ... said study co-author John Simon [a chemistry professor and U.Va. executive vice president and provost]. ... Studying soft tissue, he added, "could give us a whole new window into species that are extinct and their relationships to modern-day" life-forms.