Alien abduction: This fossil crinoid, which inspired the artist who designed the extra-terrestrial antagonist of the Alien films, was stolen and and later returned to a museum in Switzerland. I can see the resemblance.
Dimetrodon footprint Dimetrodon meaning "two measures of teeth") is an extinct genus of synapsid that lived during the Early Permian period, around 295–272 million years ago (Ma).It is a member of the family Sphenacodontidae. The most prominent feature of Dimetrodon is the large sail on its back formed by elongated spines extending from the vertebrae. It walked on four legs and had a tall, curved skull with large teeth of different sizes set along the jaws