American astrophysicist and science writer, professor at University of Rochester, studying the search for alien civilizations.
What we don't understand often frightens us. But science lives in the unknown.
History shows us that civilizations rise and fall. It should teach us humility.
Intelligence may develop differently, but the questions it asks might be universal.
The discovery of thousands of planets beyond our system showed us that Earth's system is just one of many.
One of the greatest mysteries is whether we are alone. And if we are not, what does that change about us?
The search for extraterrestrial intelligence is not just astronomy, it is philosophy about our place in the universe.
Life in the universe may be as natural as stars. It is just rarely seen.