What if Earth wasn’t always blue and green… but purple?
According to the Purple Earth Hypothesis, the earliest life forms may have used a different light-absorbing pigment — retinal — giving Earth a deep violet glow billions of years ago!
In this fascinating short, we explore a mind-blowing theory that suggests our planet might have once looked completely alien… with purple oceans, violet skies, and a world unlike anything we know today.
Did life really begin in purple?
What does this mean for the search for alien life?
Could other worlds be glowing purple right now?
Get ready to question everything you know about Earth’s past in this one-minute science deep dive that’s as mysterious as it is beautiful.
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