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Beware of online filter bubbles.
17 gigapixel photo.
Shy guy blows audience away with opera voice.
This is impossible...
How many of you would do this without hesitation?
Cool paper toy.
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In this TED-Ed animated video by John Lloyd, we're shown what exactly in the world is invisible. Gravity, daytime stars, thoughts, the human genome, time, atoms, so many things we don't realize we can't see.