The ancient Earth was a pretty miserable place. But from this eruptive, radiation-blasted, asteroid-pummeled wasteland, life did arise. Now, scientists have uncovered a tantalizing clue that Earth’s first hardy colonizers appeared much earlier than we thought.
How did a bunch of lifeless molecules transform themselves into living cells, turning the ancient, dead Earth into a planet teeming with life? It's an incredibly difficult question to answer, but a new model might explain part of the story.
The origin of life on Earth poses a basic paradox: basic biochemicals like nucleotides and catalysts like proteins need each other to exist, but one must have come first. We may now have an answer, thanks to the transition metals.
Are asteroids responsible for the creation of life on Earth? Recent experiments back up a theory that the basic ingredients for life came from beyond the stars... which makes us all aliens. Battlestar Galactica was right!