Sir David Attenborough explores how a North Dakota fossil dig site could hold clues to what happened the day an asteroid struck Earth and wiped out the dinosaurs.
Sir David Attenborough explores how a North Dakota fossil dig site could hold clues to what happened the day an asteroid struck Earth and wiped out the dinosaurs.
By submitting your comments, you hereby give AZPM the right to post your comments and potentially use them in any other form of media operated by this institution.