Volcanoes May Have Sparked Life on Earth, Study Says

Before life evolved on Earth, most scientists believe that amino acids–molecules that are the basic building blocks of life–were first formed via interactions on Earth or brought to it via collisions with comets and meteorites.

“But how did [the amino acids] form peptides [which are necessary for living cells]? What is the condensing agent?” said Reza Ghadiri, a molecular chemist at the Scripps Research Institute in La Jolla, California. “That is a major problem.”