Since construction workers discovered dozens of fossils along a highway in Chile in 2011, one question has preoccupied researchers: What killed the whales, seals and other creatures that ended up there more than 5 million years ago?
Since construction workers discovered dozens of fossils along a highway in Chile in 2011, one question has preoccupied researchers: What killed the whales, seals and other creatures that ended up there more than 5 million years ago?