The modern crocodile can breathe while most of its head is submerged because of specialized airway adaptations, which scientists can now trace to the Jurassic period.
More than 55 earthquakes have struck off the Oregon coast, but the swarm is not likely to trigger any danger to those on land.
The newfound version, BA.2, may be slightly harder to track.
The remains of a man, possibly a slave, indicate that he was crucified in the third or fourth century A.D. in Roman England.