Did it snow on Mars? New research suggests ancient Red Planet precipitation was a lot like Earth

Did it snow on Mars? New research suggests ancient Red Planet precipitation was a lot like Earth

It's hard to figure out if Mars was “warm and wet” in its ancient past, but climate models give us clues

New study finds ancient Mars likely had rainfall, snow and flowing rivers

Visit Mars as it might have looked billions of years ago. Not frozen and dry, but wet, warm, and alive with flowing water. Across vast highlands near the Martian equator, deep river-like valleys snake through the surface. These valleys don’t just suggest water—they hint at something much bigger: a world with an active climate and possibly even rainfall. That idea challenges many climate models of early Mars, which predict that the planet should …