The way proteins move is often what gives them biological activity: they can open, close, twist, and rearrange themselves in ways that allow them to bind to other molecules or perform complex ...

The “arsenic life” microbe came from Mono Lake, a highly alkaline, arsenic-rich body of water in California. Credit: Al Ungar/Shutterstock In the retraction notice, H. Holden Thorp, Science’s editor ...