We owe our existence to little photosynthetic bacteria — but there is much more to this story, as life can only mutate and adapt when the planet offers the right conditions.
November 15, 2017
Posted
There's something deeply moving about watching the sun become progressively covered by the moon — and you have a rare chance to see this in the U.S. on Aug. 21.
July 26, 2017
Posted
The probe found enough energy to send a signal — which hadn't been guaranteed. If all goes well, we may know fairly soon whether the comet it's on carries the stuff of life.
June 30, 2015
Posted
