5
The annual 'biblical' migration of bright red crabs on Christmas Island is a spectacle like no other on Earth.
50
The veteran Apollo astronaut has called on the US government to hasten its efforts to colonize Mars.
47
As many as 13 million people who live on the US coast could become homeless by the end of the century.
34
Anthropologists have discovered 47 human teeth in a cave in Southern China that date back 80,000 years.
158
Scientists have found a genetic link between the indigenous peoples of Australia and South America.