Listen to this episode from On Point on Spotify. Was Mars once like Earth? Can you imagine the red planet once a verdant green? That might be stretching it a bit, but NASA scientists are on an ambitious hunt for evidence of ancient Martian microbes. What they discover could transform our understanding of life back here on Earth. Ken Farley and Dawn Sumner join Meghna Chakrabarti.

Listen to this episode from On Point on Spotify. Was Mars once like Earth? Can you imagine the red planet once a verdant green? That might be stretching it a bit, but NASA scientists are on an ambitious hunt for evidence of ancient Martian microbes. What they discover could transform our understanding of life back here on Earth. Ken Farley and Dawn Sumner join Meghna Chakrabarti.