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Transcript
00:00Why do 99% of Mars fans not realize the red planet was once wet and blue?
00:05Mars didn't start out as a desert.
00:07Here's how it lost its shot at life.
00:09Billions of years ago, Mars had lakes, rivers, and maybe even a massive ocean.
00:14Enough water to cover a third of the planet.
00:17But Mars' climate was wild.
00:19Short bursts of warmth, then endless cold.
00:22These life windows were rare and never lasted long enough for anything complex to evolve.
00:27Then things got worse.
00:29Mars' core cooled down, its magnetic shield faded, and the solar wind blasted away the atmosphere.
00:35That's when water started vanishing.
00:37Some escaped into space, while a lot got trapped forever in Martian rocks.
00:42Today, most of Mars is a frozen wasteland.
00:44But deep underground, salty water might still hide in secret pockets, maybe even sheltering life right now.
00:51So Mars wasn't always a barren red rock.
00:53Its story is a cosmic warning about how fragile a habitable planet can be.
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