jtotheizzoe:

skunkbear:

Ancient Mars had a thick atmosphere filled with carbon dioxide that kept it warm.
Rivers trickled into lakes across its surface. Some researchers think
there might even have been an ocean. It looked a lot like ancient Earth.

But Mars doesn’t have Earth’s magnetic field, and that has made all the difference. Our magnetic field blocks solar wind – the high energy particles emitted by the sun. 

Thanks to new data from the Mars Atmosphere and Volatile Evolution Mission (MAVEN) we know that this solar wind has been assaulting Mars for centuries, and as a result its atmosphere is constantly leaking into space. 

Read more here!

Be thankful you live on a magnet, folks.