This may be a piece of the asteroid that killed the dinosaurs

Last month, we learned that researchers excavating North Dakota's Tanis fossil site found an incredibly well-preserved leg of a dinosaur. The creatureand others at the sitewere likely killed by the impact of the 12 kilometer-wide Chicxulub asteroid that crashed into the Gulf of Mexico 66 million years ago and eradicated 80% of Earth's animals. — Read the rest