Although the planet’s atmosphere is presently losing about 100 grams per second—the equivalent of a McDonald’s Quarter Pounder—scientists sayMars lost the bulk of its once thick atmosphere billions of years ago, a relatively short time after oursolar system formed.
I’m not sure when McDonald’s food became a unit of measure. That was an interesting choice.
How Mars lost its atmosphere and became a cold, dry world http://arstechnica.com/science/2015/11/how-mars-lost-its-atmosphere-and-became-a-cold-dry-world/