Mars died billions of years ago, and its guts are still spilling into space

Earth remains a blue marble while Mars has become a dry husk of its former self. While most of the desiccation resulted from the calamitous loss of Mars’s atmosphere, the planet has kept some of its water. But even that meager supply is leaking away. So how did Mars die? After repeatedly skimming the upper reaches of the Martian atmosphere with an orbiting probe, researchers have another piece of the puzzle.

Asteroids Smashing into the Earth Might Have Kickstarted Life

Where did the waters of Mars go? Underground. Maybe Martian life did, too.

How We'll Die on Mars: Solving Problems for Future Trips to Mars

How We'll Die on Mars: Solving Problems for Future Trips to Mars

Was Mars once like Earth? - Quora

Ancient Mars May Have Been Teeming With Life, Until It Drove Climate Change That Caused Its Demise

How We'll Die on Mars: Solving Problems for Future Trips to Mars

This Is Why Mars Is Red And Dead While Earth Is Blue And Alive, by Ethan Siegel, Starts With A Bang!

How Mars lost its atmosphere, and why Earth didn't - The Washington Post

NASA Just Broke the 'Venus Curse': Here's What It Took

Why does Mars have more volcanic activity than Earth, even though Earth is larger? - Quora

Mars' small size limited its habitability

Mars' small size limited its habitability