Astronomers claim first snaps of planets beyond the Solar System

Images of potential planets orbiting distant stars after decade-long search.

The pitfalls of tracing your ancestry

Charmaine Royal of the Duke Institute for Genome Sciences and Policy explains the limitations of genetic testing.

How does bleach bleach?

The ubiquitous disinfectant may kill bacteria by unfolding their proteins.

Illegal drug shows promise in treating trauma symptoms

MDMA may boost the benefits of psychotherapy, trial suggests.