First, there is the thermodynamic arrow, which relates to entropy.

Webit had always been thought that nothing could escape a black hole;

Webhawking once asked, “what is it that breathes fire into the equations and makes a universe for them to describe?” there is no what that can be the answer to that.

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This arrow points in the direction of.

That is now known.

Hawking suggested that under certain conditions, a black hole could emit subatomic particles.

Webstephen hawking suggests there are three arrows of time.

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