The beauty of physics lies in its ability to explain the complex with simple laws.

The coal industry has a critical role to play in providing affordable and reliable energy while we transition to a lower-carbon future.

People change and forget to tell each other.

I'm very proud to be black, but black is not all I am. That's my cultural historical background, my genetic makeup, but it's not all of who I am nor is it the basis from which I answer every question.

The best way to predict the future is to create it.