What are some of the mysteries of physics?

[Achilles]

What are some of the mysteries in physics that we have yet to be understood or discovered?

[mathematic]

dark matter and dark energy, black hole interior

[Phi for All]

Why some people think they can solve a physics mystery with only popular science study instead of mainstream coursework in actual physics. 

[StringJunky]

13 minutes ago, Phi for All said:

Why some people think they can solve a physics mystery with only popular science study instead of mainstream coursework in actual physics. 

The answer is just a beer and a thought away.  

[Phi for All]

1 minute ago, StringJunky said:

The answer is just a beer and a thought away.  

Beer is a gateway drug. Pretty soon, you're showering while reading a laminated copy of Scientific American.

[Moreno]

Gravitation waves, antigravity, quantum gravity theory, Big Bang. 

[Eise]

List of unsolved problems in physics