Scientists Suggest That Mars Was Warm and Held Water Billions of Years Ago, Much More Like Earth in the Past Researchers have ...

The ammonia could raise Mars' greenhouse gas level. The rocket engines could be able to move the asteroids 3 miles per second, for a period of ten years, before they shut down and allowed the ...

Harvard scientists explain how Mars had warm spells billions of years ago, allowing rivers and lakes to exist.

But as Mars lost its atmosphere and Venus' atmosphere experienced a runaway greenhouse effect ... which will look for gases in the atmosphere that indicate the past (or, in trace amounts, present ...

Periods during which this greenhouse gas created a thicker atmosphere meant the possibility of liquid water on Mars, which could have sustained life. Formations that look like jumbo-sized kidney ...

Venus is a runaway greenhouse world with a scorching atmosphere, and Mars is a frozen desert ... other oases may awaken on the faraway moons of the gas giants - like Saturn’s moon Titan.