Life in the UniverseExplainer
The Fermi Paradox: Where Is Everybody?
Planets are everywhere, yet the sky seems silent. Here is what that silence does and doesn't tell us, and how scientists are listening now.
SECTION
Life in the Universe.
How did life begin—and are we alone?
How life began on Earth, how evolution works, and whether anyone else is out there, with the evidence labelled at every step.
Life in the UniverseExplainer
How Did Life on Earth Begin?
Life appeared early on a young Earth, but no lab has yet recreated the leap from chemistry to biology, and the question remains open.
Life in the UniverseExplainer
How Does Evolution Actually Work?
Small inherited differences, filtered over countless generations, add up to the variety of life. Here is how evolution works and how we know.
Life in the UniverseExplainer
Are We Alone in the Universe?
Planets are common. Evidence of life beyond Earth has yet to be confirmed.