[apillar]

“Previously, many scientists had assumed that losing carbon dioxide from the atmosphere, which helped to keep Mars warm, caused the trouble.”

Lol! A Billion years ago, the Martians listened to their liberal Scientists and Politcians, and started trapping all their Carbon Dioxide to prevent Global Warming, the result, Mars turned into a cold, dry wasteland without the Carbon Dioxide to act as a greenhouse.

[Boogieman]

“started trapping all their Carbon Dioxide”

One problem with this speculation by the scientists that loss of CO2 caused it, is that the Martian atmosphere is still 95% CO2. So if Mars was losing CO2, it apparently wasn’t losing it any faster than it was losing the rest of its atmosphere.