From Eurasia's vast potential to growing new development ... from nations covering 55 million sq km (over 21 sq miles) of land with a total population of over 5 billion - compared to the US ...

A Bennu-type asteroid could lead to “severe environmental consequences,” researchers write, while acknowledging that a collision is not likely.

Sea levels plummeted, exposing land bridges between Africa and Eurasia and between Eurasia and North America. Eventually, South America moved north and merged with North America, forming the ...