Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

Blue Origin sent six more people to the edge of space on its New Shepard rocket on Thursday morning.

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

Hollow hairs are a key survival tool for Arctic animals, which have evolved to grow extraordinary weather-proof coats.

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago ...

The Arctic is changing rapidly, and scientists have uncovered a powerful mix of natural and human-driven processes fueling that change. Cracks in sea ice release heat and pollutants that form clouds ...

Chinese research submarines for the first time traveled thousands of feet beneath the Arctic ice this summer, a technical feat with chilling military and commercial implications for America and its ...

This is read by an automated voice. Please report any issues or inconsistencies here. Trump argues the U.S. needs Greenland for Arctic security, citing competition with Russia and China and the ...

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The world’s polar bear population is projected to decline by two-thirds by 2050. A new study from the University of East Anglia suggests that polar bears are undergoing rapid genetic changes, and ...

The U.S. Coast Guard is updating its fleet, adding up to six Arctic Security Cutter (ASC) icebreaker ships as part of joint security efforts between the United States and Finland. USCG made the ...