Add Yahoo as a preferred source to see more of our stories on Google. Physicists have worked out exactly how fast time passes on Mars compared with Earth. (CREDIT: Wikimedia / CC BY-SA 4.0) On Earth, ...

On Earth, knowing the time feels simple. Your phone pings the same second as a GPS satellite and an atomic clock in a lab. Everything is wired together so well that you rarely think about the ...

At one time, astronomers believed the surface of Mars was crisscrossed by canal systems. This in turn gave rise to speculation that Mars was very much like Earth, capable of supporting life and home ...

Reading the "Mars Trilogy" by Kim Stanley Robinson brings the benefits and pitfalls of efforts to terraform the red planet ...

There is a lot of evidence from orbiting satellites and surface rovers indicating that liquid water was present long ago on ...

Ancient ripple layers on Mars capture a single sandstorm, helping scientists estimate how dense the planet’s atmosphere once ...

It’s not little green men with flying saucers and laser guns that scientists are worried about, instead our foes will be much ...

Earth’s climate is not only shaped by smokestacks, forests, and oceans. It is also quietly tuned by the slow choreography of the planets, with Mars acting as a distant partner that nudges our world’s ...

From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or November at intervals of 100.5, 79, 25.5, and 79 years. During these events, Earth and the Moon ...