In living organisms today, complex molecules like RNA and DNA are constructed with the help of enzymes. So how did these molecules form before life (and enzymes) existed? Why did some molecules end up ...

According to the RNA world hypothesis, life began when RNA molecules evolved the ability to make more copies of themselves. Now we have discovered an RNA molecule that is almost capable of this – it ...

Although the genetic material of most living organisms is DNA, various self-replicating agents rely instead on RNA, including ...

Add Yahoo as a preferred source to see more of our stories on Google. For decades, scientists have chased a mystery about how proteins’ building blocks first hooked up with RNA, the molecule carrying ...