"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if ...

Researchers uncover how Mars affects Earth’s orbit, offering new insight into the planetary forces behind ice ages.

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

A massive celestial alignment will cut off all communication between Earth and the Red Planet until January 21. Learn why the ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the ...

As an astronomer studying the universe beyond Earth, I’m fond of “outside the box” views almost by default. But one of my favorites is whenever a spacecraft takes a snapshot of our home world and the ...

A recent photo from NASA's Curiosity rover gives an idea of what Mars would look like under skies that resemble our own on ...