Hawking

Stephen Hawking argues that if humanity is still confined to Earth in 600 years it may well go extinct.

He cites overpopulation as the cause.

Proxima Centauri

A new study has found a dust ring-- possibly two-- around Proxima Centauri, the closest star to the Sun.

The ring, similar to the Kuiper Belt, suggests Proxima Centauri might have a multi-planet system.

Chinese Spaceplane

China plans to launch a reusable spaceplane by 2020 according to China's state-run news agency.

The vehicle, which could carry people or cargo, would take off and land horizontally.

Laika

Sixty years ago today, the dog Laika was launched into space by the Soviet Union.

She was the first mammal in space.

Oceans On Jupiter?

A new study suggests that gas giants, like Jupiter, may start out as warm water worlds only slightly bigger than Earth.

The next step is to see if the theory fits the general gas giant population.

Astronauts' Brains

A new study documents how the brains of astronauts change during long duration spaceflights.

Of course, so far, many astronauts have remained physically vigorous and mentally active well into old age.

Odd Couple

Scientists have found a world the size of Jupiter orbiting a star only half as massive as the Sun.

How such a tiny star could have such a huge planet is unknown.