A simulation of how substances essential for living creatures were formed on Earth reinforces the theory that life started after meteorites rained down on ... that amino acids, which are vital ...

This model reveals how vastly different the atmosphere was on ancient Earth, and how life may have first emerged.

Amino acids are small molecules that are the building blocks of proteins. Proteins serve as structural support inside the cell and they perform many vital chemical reactions. Each protein is a ...

The latest discovery will likely reinforce the theory that the amino acids that exist on Earth today were brought by meteorites that rained down on the planet after it cooled. Past analyses of ...

We know amino acids exist in some kinds of meteorites and interplanetary dust particles. When they rain down on a planet's surface, they import the possible building blocks of life, not ...