SETI Institute communications specialist Beth Johnson welcomed Professor Dagomar Degroot, environmental historian at Georgetown University, for a discussion on his new book Ripples on the Cosmic Ocean ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

And the earth was without form and void, and darkness was upon the face of the deep. Sometimes, if the night is dark and clear enough, you can look up and see the Milky Way in its arc across the sky.