Th red planet’s hot again, cold again history: Explaining persistent hydrogen in Mars’ atmosphere
Astrobitica
January 28, 2025 (Last updated: January 28, 2025) 1 minute read
The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for decades. Now, Harvard researchers think they have a good explanation for a warmer, wetter ancient Mars.