What powered the Earth's earliest life?

Early biological systems likely relied on RNA molecules to copy themselves and drive simple chemical reactions. Any system that could generate guanosine-triphosphate (GTP)—which is necessary for RNA synthesis—from prebiotic ...

Why doesn't coffee taste like caffeine?

Though decaf fans might disagree, caffeine is a critical component of a cup of joe. This compound is incredibly bitter on its own, but regular coffee itself is not. A team reporting in the Journal of Agricultural and Food ...

page 9 from 40