commentary

Testimony before the U.S. Senate on the past, present, and future of NASA.

Testimony before the U.S. Senate on the past, present, and future of NASA.

Part of collection of opinions on the topic: If I Were President...

Thoughts on the upcoming solar maximum and the 2012 doomsday myth.

Telescopes show us where we are in the universe, and also reveal our relationship to the cosmos.

Water is not just a refreshing beverage, it has other useful applications too.

Our senses allow us to collect data about the world around us, but they are also limited.

The chemistry of carbon and how it contributes to the formation of life.

A commentary on the many dangers facing the inhabitants of Earth.