For astronauts living on the International Space Station, getting sick or injured can be a big deal — they're zooming around the Earth at 17,500 mph, far beyond the reach of hospitals on the ground. Full story
Land a rover on Mars to collect rocks and soil samples that could later be returned to Earth. If that's a budget-buster, then orbit Jupiter's moon Europa, which may have a liquid ocean beneath its frozen surface, or study Uranus' atmosphere. Full story
A NASA scientist reports detecting tiny fossilized bacteria on three meteorites, and maintains these microscopic life forms are not native to Earth. Full story
NASA's Solar Dynamics Observatory captured this video of a massive solar eruption on Feb. 24. The source was an active region located just behind the sun's eastern limb, and the coronal mass ejection was not directed at Earth. (no audio)
Two Russian cosmonauts perform a spacewalk on the ISS to install new scientific technology that may be useful to predicting seismic activity on Earth. Msnbc.com's Al Stirrett reports.
Researchers in Argentina believe they have uncovered one of the first dinosaurs to have roamed the Earth. The team is calling it "Dawn Runner" because the two-legged dinosaur dates back 230-million-years. Msnbc.com's Al Stirrett reports.
A Minnesota astronomer says that due to the gradual change in the Earth's alignment, astrological signs may have shifted. NBC's Brian Williams reports.
NBC’s Richard Engel offers this video diary on one of the last pristine environments on Earth, and how a development project in Tanzania is putting that in danger.
In the grasp of the International Space Station's Canadarm2, the Italian-built Permanent Multipurpose Module is transferred from space shuttle Discovery's payload bay to be permanently attached to the Earth-facing port of the station's Unity node in this March 1, 2011 NASA handout image. Earth's ho
The aurora borealis, or northern lights, are seen on the sky above the village of Ersfjordbotn near Tromso in northern Norway on Feb. 21. Aurorae are caused by the interaction between energetic charged particles from the sun and gas molecules in the upper atmosphere of the Earth, about 100 kilometre
epa02594671 The aurora borealis or the northern lights are seen on the sky above the village of Ersfjordbotn near Tromso in northern Norway, early 21 February 2011. Aurorae are caused by the interaction between energetic charged particles from the Sun and gas molecules in the upper atmosphere of t