The mysterious presence of mantle materials more than 1,000 miles (1,609 km) from where they originated may be explained by a 'window' 62 miles (100 kilometers) below the Earth's surface.
If humans suddenly went extinct, what animals are most likely to develop human-like societies?
The millipede has over 1,300 legs and was found deep underneath Western Australia.
Climate change that led to sea level rise and severe coastal flooding could explain why the Vikings abandoned their Greenland settlements.