I'm puzzled by something.
Mars is 4, 194 miles in diameter, and Titan is 3,200 miles in diameter. Despite the 994 mile difference, the pressure on Titan is 1.6 bars, 60% greater than Earth's at sea level.
Yet the air pressure on the surface of Mars is less than 1% of Earth's (7 millibars).
What gives?? Why does Mars have a much thinner atmosphere than Titan-and why doesn't Titan's leak into space, despite the lesser gravity?