News

Space

Another potentially habitable world emerges

The newfound planet orbits a common type of dwarf star, suggesting even more may be out there.

Chemistry

Big jobs go to loyal proteins

Cells offload much of their nonessential work on enzymes that juggle a number of tasks.

Humans

DNA unveils enigmatic Denisovans

Technical advances amplify the genetic record of a Stone Age humanlike population, ancestors of modern Melanesians.

Space

Stars’ missing elements could signal lurking small planets

The sun's chemistry suggests some good other places to hunt for rocky orbs.

Health & Medicine

Low-cal longevity questioned

Limited food intake in rhesus monkeys fails to extend the animals’ survival, in a departure from earlier reports.