The new findings strengthen the "RNA world" hypothesis that describes how the first life on Earth could have used RNA instead ...

A new research paper featured as the cover of Volume 17, Issue 12 of Aging-US was published on December 22, 2025, titled "A ...

Long known as a messenger within cells, RNA is increasingly seen as life’s molecular communication system — even between organisms widely separated by evolution. For a molecule of RNA, the world is a ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. In 1957, just four years after Francis Crick and other scientists solved the riddle of ...

The natural RNAi mechanism can be directed by either short interfering RNA (siRNA) or microRNA (miRNA). 1 There are four key steps in the RNAi pathway. When miRNA acts as the guide for RNAi, only a ...

Viruses are entities that have to infect other cells in order to replicate. They may have genomes that are made of DNA or RNA. We are still discovering new types of RNA viruses, as shown in two new ...

Using a novel method, Weizmann Institute of Science researchers map 16 types of simultaneous changes in dozens of samples; ...