NASA scientists want to solve a mystery: Why did life "turn left?"
When NASA launched a spacecraft to an asteroid, scientists patiently waited for their chance to look at bits of the space ...
EurekAlert!2 个月
Left-hand and right-hand amino acid illustration (IMAGE)
A diagram of left-handed and right-handed versions of the amino acid isovaline, found in the Murchison meteorite. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news ...