Learn about the activation and deactivation of genes over long distances of DNA - an ability that emerged in comb jellies and ...

Life depends on genes being switched on and off at exactly the right time. Even the simplest living organisms do this, but usually over short distances across the DNA sequence, with the on/off switch ...

Comb jellies "could repurpose [their] genetic toolkit in different ways like a Swiss knife," said the researchers.

Hundreds of millions of years before oxygen surged in the atmosphere 2.4 billion years ago, swaths of oxygen winked in and out of existence in the ocean.

A complete Mixodectes pungens skeleton reveals it was a leaf-eating, tree-dwelling mammal closely related to primates and ...