The whole hardware industry has experienced the phenomenon in which every time computers get cheaper, they appeal to a new set of users; every time they get more powerful, old customers upgrade.

Chefs think about what it's like to make food. Being a scientist in the kitchen is about asking why something works, and how it works.

Ultimately, my Ph.D. is in mathematical physics, focusing on quantum field theory and curved space-time, and I worked with Stephen Hawking.

The cloning procedure is similar to IVF. The only difference is that the DNA of sperm and egg would be replaced by DNA from an adult cell. What law or principle - secular, humanist, or religious - says that one combination of genetic material in a flask is OK, but another is not?

Cooking is for chefs. Science informs us and lets us cook while knowing what we are doing, but it is not a replacement for the skills of a chef.

Words can hurt you. In the larger world, it frames how people think about you, and it can hurt you in lots of little, subtle ways.

By burning nuclear waste as fuel, we believe we can power the United States cleanly for hundreds of years without ever touching new resources.