Caleb Scharf

There may be more than one way to tune a universe for life.

Are space scientists too conservative and close-minded about the possibility that ET exists?

It’s a myth that legendary works in science aren’t read.

Adventures in space travel remind us how imprecisely we measure reality.

Like any good version of Powers of Ten, use this app and you can find yourself getting that feeling of cosmic awe—it might take a little attention, but that’s always going to be true.Photograph by RollingCamera / Shutterstock One of the weirdest things about our human experience of the world is how remarkably narrow it […]

See where NASA’s Mars 2020 mission will go and what it may find.

Black holes are cosmic dimmers.

On the origin of an interstellar species.

On the red planet, existential threats abound.

Life on Earth is a sketchy guide to intelligent life in the cosmos.