Mexican scientists said they have identified the world’s oldest lobster fossil, a creature that was alive when Africa was only just breaking apart from the Americas some 120 million years ago. The fossil is 4.7 inches long and its shell and legs are immaculately preserved by the mud in the southern state of Chiapas where it was found. It is dated as 120 million years old, some 20 million years older than existing lobster fossils.