Fossilized Skeletons of Giant Flying and Aquatic Reptiles to Be Auctioned

Sotheby's will auction a 20-foot wingspan pteranodon nicknamed "Horus" and an 11-foot plesiosaur nicknamed "Nessie."
The Kansas pteranodon is estimated to sell for $4-6 million while the English plesiosaur could sell for $600,000-800,000.
The pteranodon was an aerial predator discovered in 2002 that could fly over water and fish with its beak.
The plesiosaur was an aquatic reptile with a snake-like neck and flippers that lived about 190 million years ago.
The seller of the rare fossils, which are tens of millions of years old, has not been identified.