By 
Chris Anderson (TED)
 | 
TED-Ed Original

Questions no one knows the answers to

TED curator Chris Anderson shares his obsession with questions that no one (yet) knows the answers to. A short intro leads into two questions: Why can't we see evidence of alien life? And how many universes are there?

Related tags:

ted-ed
education
science
philosophy
space
planets
consciousness
math
physics
curiosity
universe
string theory
dark matter
aliens
nanotechnology
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