Galactic rays

Galactic rays

Scientists have tracked a light beam that’s half-a-million light years long to a monster black hole and found that the hole and its More »

Light at night: Mixed blessing!

Light at night: Mixed blessing!

Researchers are finding more links to obesity, cancer, and sleep disturbances. Light blocks the release of melatonin, a hormone More »

Dunewatching, Martian style

Dunewatching, Martian style

New pix from Mars show sand dunes on the move. Mars has been dry for 1.5 billion years; could massive erosion be due to wind? Yes, says More »

Chasing neutrinos at the South Pole

Chasing neutrinos at the South Pole

Neutrinos are odd: Extremely difficult to see, they travel through mass with scarcely a trace. A 1-billion ton detector in South Pole More »

Running out of space

Tommy and his spacedog point up to Spaceship One

With space shuttles in museums, the near-term American plan to return to space relies on other countries or private firms. What are the More »

Ancient hole, black hole

Ancient hole, black hole

A new report on the ancient universe shows that most galaxies – even all of them – had a black hole at the center, much like modern More »

The importance of being Einstein

Black and white photo: closeup of Einstein's face with blackboard in background

Experiment finds Earth “dragging” spacetime, as Einstein predicted. Einstein knew his physics. Bending light, gravity lenses, shifting More »

Pop goes the super supernova

Pop goes the super supernova
Titanic explosion shows one of the biggest bangs since the Biggest Bang, spreads useful elements through the universe. Finally More »

Super View of Supernova

After 20 years, star explosion reveals more secrets. What gives in these giant bangs?