Scientists Discover Giant, 2-Feet Long Clams That May Have Fed Prehistoric Humans

Scientists Discover Giant, 2-Feet Long Clams That May Have Fed Prehistoric Humans: "Giant clams two feet long might have helped feed prehistoric humans as they first migrated out of Africa, new research reveals.

The species, Tridacna costata, once accounted for more than 80 percent of giant clams in the Red Sea, researcher now say. Today, these mollusks, the first new living species of giant clam found in two decades, represent less than 1 percent of giant clams living there."