Extreme gas loss dried out Mars, MAVEN data suggest
Argon lost to interactions with solar wind hints at transformed climate
![MAVEN probe](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/03/033017_AY_mars_main_REV.jpg?fit=860%2C460&ssl=1)
LOST IN SPACE Solar wind has expelled two-thirds of the Martian atmosphere’s argon and a majority of its carbon dioxide into space, data from the MAVEN probe (illustrated here) suggest.
GSFC/NASA