NASA

Scientists have found evidence for a new planet that could be the nearest world to our solar system. Yes, NASA astronomers using the Spitzer Space Telescope have detected what they believe is a planet two-thirds the size of the Earth.

An iceberg twice the size of Manhattan has reportedly broken free of one of Greenland's largest glaciers.

NASA astronaut Sunita Williams along with Russian cosmonaut Yury Malenchenko and Japan's Akihito Hoshide departed for the International Space Station on a Russian Soyuz from Baikonur cosmodrome in Kazakhstan Sunday morning.

Two science papers published July 8, 2012, disprove a major claim made by NASA-funded scientists that a new form of bacterial life that thrives on arsenic was discovered.

New research papers delivered a devastating double blow to a former NASA astrobiologist's claim to have discovered a bacterium that can feed on arsenic.

NASA released new photos of Thursday from the Mars Exploration Rover Opportunity with panoramic pictures showing the terrain at Greeley Haven over four months during the most recent Martian winter.

NASA released this week a stunning image produced by combining 817 photographs it was able to capture via the panoramic camera, or Pancam, on the Mars Exploration Rover Opportunity between Dec. 21 and May 8.

Alan Dex Poindexter, a former space shuttle commander, died Sunday after being injured in a water sports accident in Florida. He was 50. According to multiple news reports citing the Florida Fish and Wildlife Commission (FWC), Poindexter was jet skiing with his two sons near Little Sabine Bay off of Pensacola Beach, Fla.

Wrapping up a mission that lasted six-and-a-half months, three members of the Expedition 31 crew undocked from the International Space Station and landed safely in the steppe of Kazakhstan in the early hours Sunday.

Thousands of miles away, a cadre of international Nobel laureates assembled to discuss global warming were having a, er, heated debate, arguing over data that the vast majority of scientists the world over say shows clear evidence of manmade climate change. But in the steaming streets of Brooklyn, the crowded public pools of Atlanta and the power outage-hit suburbs of Washington, D.C., the discussion was unanimous: It was hot.

A map of the world's earthquakes that plots every temblor with a magnitude of 4.0 or greater since 1898 is surprising scientists for a number of reasons.

Blink and you'll miss it.

Regardless of whether you give credence to doomsday prophecies, there are some slightly credible scenarios in which the world will end -- either with a bang or with a whimper.

Millions of years ago, the ice-covered Antarctica was much warmer and wetter than it is today, claimed a recent study. The climate along the edges of the frozen continent was even suitable to support substantial vegetation including stunted trees.

China put its first woman into orbit on Saturday, one of three astronauts to attempt a critical space docking in the latest challenge for the country's ambitious space programme. A Long March rocket blasted off in the early evening from the remote Jiuquan Satellite Launch Centre in the northwestern Gobi Desert, carrying with it the Shenzhou 9 spacecraft and the three astronauts, including 33-year-old female fighter pilot Liu Yang.

Based on latest findings and data released by NASA, researchers now anticipate that asteroid 2011 AG5, discovered in January 2011, will fly safely past, without impacting Earth in 2040.

Nuclear Spectroscopic Telescope Array (NuSTAR), NASA's new high energy X-ray detecting telescope was launched over the central Pacific Ocean Wednesday, marking the its mission to unearth secrets of the buried black holes and other alien objects.

By the end of this week, China may have already finished its first manned space docking and successfully sent its first woman into space.

Sounding more climate change alarms, NOAA reports the U.S. just emerged from the warmest spring recorded.

Scientists describe finding an unprecedented phytoplankton bloom in the Arctic -- akin to stumbling across a rainforest in the middle of the Sahara.

Thanks to a NASA-sponsored expedition to the Arctic Ocean in the summers of 2010 and 2011, scientists have found an area underneath sea ice, which is richer in microscopic marine plants, essential to all sea life, than any other ocean region on the Earth.