Winners of International Earth & Sky Photo Contest!

This year's winners were selected from images taken in 55 countries during 2013 and 2014.

Rosetta spacecraft sees target comet wake up, then go quiet again

An April 2014 image of Comet 67P/Churyumov-Gerasimenko showed activity, as the comet nears the sun. But a June 4 image shows the comet has quieted again.

International Space Station sends a laser message from space

On June 5, astronauts aboard ISS used a beam of laser light to send an HD video to researchers waiting below.

Is Mauna Loa volcano beginning to stir?

Over the past 13 months, the Volcano Observatory in Hawaii has recorded increased activity on the flanks and summit of Mauna Loa, the largest volcano on Earth.

Wonderful video of 30 dolphins surfing

See a pod of dolphins in south Western Australia simultaneously catch a wave.

Preliminary data show May 2014 as warmest May on record

It now seems possible that 2014 could become the hottest year on record, if the trend from the first five months continues.

If drinking purified pee weirds you out, don’t live in a desert

Water recycling is probably a better option for California and other desert areas, assuming people can get used to the yuck factor.

Hubble Space Telescope to seek spacecraft target beyond Pluto

NASA okays the use of the Hubble Space Telescope in the search for an object the New Horizons spacecraft can visit after its Pluto encounter in 2015.

Physicist and artist unveil designs for warp-speed spacecraft

The technology needed to create a faster-than-light spacecraft doesn't exist yet. Will a spacecraft like this one someday carry humans to the stars?

Scientists believe a hidden “ocean” lies deep within Earth

They believe there might be three times as much water deep underground as exists in all the world's surface oceans.