Earlier generations of stars in the galaxy could well have had planets. But really, there was only hydrogen and helium to work with, so they'd all be….

The existence of life beyond Earth is an ancient human concern. Over the years, however, attempts to understand humanity's place in the cosmos throug….

The space that we're looking through is nine-dimensional. If you build a mathematical model, the amount of searching that we've done in 50 years is e….

The story of humans is the story of ideas that shine light into dark corners..

In the future, will our technologies help stabilise or planet and population, leading to a very long lifetime for us? Or will we destroy our world an….

We are made out of stardust. The iron in the hemoglobin molecules in the blood in your right hand came from a star that blew up 8 billion years ago. ….

Ultimately, we actually all belong to only one tribe, to Earthlings..

SETI is a mirror, a mirror that can show ourselves from an extraordinary perspective and can help to trivialize the differences among us..

Might it be the discovery of a distant civilization and our common cosmic origins that finally drives home the message of the bond among all humans. ….

We don't know how to identify intelligence over interstellar distances, so what we do instead is use technology for a proxy..

We, all of us, are what happens when a primordial mixture of hydrogen and helium evolves for so long that it begins to ask where it came from..