What is the most interesting scientific theory/experiment/project/etc. that you've ever heard?

Mine is cryogenics. For those of you who don't know, cryogenic sleep is when a human steps inside a tank, which is then filled with liquid; the human is "frozen," and they stay that way until they can get thawed out.
Another scientific project-thing I find intriguing is Mars1. That's an experimental mission that NASA has planned for the future in which a set of humans go to Mars and colonize it. Research "terraforming Mars"; it's really cool.

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DemiLovato567
The theory that in 6 billion years, the Sun will become too big and create a super nova - which will destroy the whole of humanity.
on May 26
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AnimatronicHeart
The Big Bang
on May 26
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tylnapp
The Theory on White Holes in space, the complete opposite of black holes which we only have one documented sighting of one possible white hole...
MysticMedievalSamuraiPrincess
Oh yeah, I love those! I did a project on them in 6th grade!
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on May 26
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on May 26
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