What is a pre-Columbian Inca site located 2,430 metres (7,970 ft) above sea level, on a ridge above the Urubamba Valley in Peru?
Which sea is part of the Arctic Ocean north of Siberia, bounded on the west by Novaya Zemlya and to the east by the Severnaya Zemlya?
The now-extinct Elephant Bird, believed to have been 3 metres tall and weigh 500 kg, was believed to have inhabited what area?
