It had a boomerang-like head shield and dozens of legs studded with daggers.
A previously unknown Maya site in Tabasco, Mexico is the civilization's largest and oldest monumental structure on record.
Much of the Eastern Hemisphere will see a penumbral lunar eclipse on Friday, but to North America, it will be just a regular full moon.
Rediscovered footage of a thylacine taken in 1935 is the last-known recording of the marsupial, which went extinct in 1936.
Excavators have already found the remains of about 60 mammoths and 15 pre-Hispanic indigenous people.
A squid-like creature was hunting for a meal about 200 million years ago, but it never got to gulp down its supper.