In wisdom gathered over time I have found that every experience is a form of exploration.

The negative is the equivalent of the composer's score, and the print the performance.

The negative is comparable to the composer's score and the print to its performance. Each performance differs in subtle ways.

Yosemite Valley, to me, is always a sunrise, a glitter of green and golden wonder in a vast edifice of stone and space.

One of the strangest features of string theory is that it requires more than the three spatial dimensions that we see directly in the world around us. That sounds like science fiction, but it is an indisputable outcome of the mathematics of string theory.

People talk about offensive chemistry all the time, but defensive chemistry is something you have to build, too, and there's a lot of that work to be done with just communications and the feel of who certain guys play.

The bottom line is that time travel is allowed by the laws of physics.

Representation is so important because it's hard for kids to want to be what they can't see. Little girls and boys need to know that it's natural for girls to love science and tech.