Billionaire developer Ken Griffin owns several significant pieces of American history, including copies of the U.S.

Griffin paid a record $13.7M for the 13th Amendment and $4.4 million for the Emancipation Proclamation. Both documents were ...

This dinosaur dug its own grave. SCIENCE. Rare fossils reveal a stunning scene from the final days of the dinosaurs. One of the most striking finds is the rate at which material was re-deposited ...