15 June 2011, 01:52 AM ET
What if dinosaurs and Neanderthals had not gone extinct? What if the sun was twice as large? How 10 key moments in history could change the present.
14 June 2011, 08:00 AM ET
What if dinosaurs had not gone extinct? What if Earth was twice as large? How 10 key moments in history could change the present.
11 June 2011, 01:57 PM ET
See photos from the June 10 NASA rocket launch that sent the ocean salt-mapping satellite Aquarius/SAC-D into orbit.
10 June 2011, 11:32 AM ET
The Aquarius/SAC-D satellite will map the saltiness of Earth's oceans from space.
10 June 2011, 10:40 AM ET
NASA's sea salt measurement mission will help scientists understand how salinity effects Earth's climate. Launched on Jun 10, 2011, Aquarius may help predict climate trends in the future.
10 June 2011, 08:56 AM ET
The survival of the Netherlands depends on good adaptation to what happens in the climate" says Prince Willem-Alexander. Europe's Cryosat mission is measuring the changes in ice thickness at the north and south poles to make a better assessment.
10 June 2011, 12:00 AM ET
NASA is set for Friday's launch of its Aquarius observatory, which will map out the links between Earth's climate and the saltiness of its oceans.
09 June 2011, 01:52 PM ET
NASA's Calipso satellite is five years old and observes the atmosphere.
02 June 2011, 05:35 PM ET
An asteroid the size of a small motorhome zoomed near Earth last night (June 1), coming closer to us than the moon sits.
02 June 2011, 10:53 AM ET
Orbiting our planet, spacecraft really take their lumps and bumps. Europe's GOCE satellite has produced the most detailed map of the Earth's gravitational field, helping scientists understand ocean circulation and its effects on climate change.
02 June 2011, 07:00 AM ET
Take a clay model of Earth and squish it with your fingers, and the result will appear similar to the geoid — the latest and best-ever map of our planet's gravitational field.
31 May 2011, 10:43 AM ET
Spectacular photos show Endeavour at the space station over nighttime Earth.
27 May 2011, 09:20 AM ET
The target of NASA's new OSIRIS-Rex mission is an asteroid that might slam into Earth in 171 years.
26 May 2011, 02:00 PM ET
Scientists may have to rethink some of their ideas about how the moon formed.
21 May 2011, 08:24 AM ET
Pope Benedict XVI talks about the delicate nature of the Earth on many levels in a conversation with astronauts aboard the ISS on May 21, 2011.
18 May 2011, 10:00 AM ET
The magnetosphere protects life on Earth from harmful solar storms.
18 May 2011, 06:30 AM ET
NASA's Aquarius/SAC-D mission will take global measurements of the saltiness, or salinity, of Earth's oceans.
12 May 2011, 09:19 PM ET
Water circulation from ocean to atmosphere, to land and back has a major impact on oceanic salinity levels; NASA's Aquarius satellite will give scientists the ability to monitor the effects of those changes on ocean circulation and the climate.
12 May 2011, 08:57 PM ET
NASA's Aquarius satellite will sport a state of the art radiometer for detecting natural thermal emissions and a scatterometer, to compensate for waves, in this study of the impact of ocean salinity on climate change.
12 May 2011, 08:31 PM ET
NASA's mission to study the role salinity plays in climate change.
12 May 2011, 01:30 PM ET
NASA's Aquarius mission to study ocean salinity will improve the understanding of water cycle, ocean circulation and climate, according to Project Manager Amit Sen.
12 May 2011, 01:19 PM ET
Salinity has an major impact on ocean circulation, thus affecting how heat is distributed on Earth. NASA's Aquarius mission will measure salt levels to give scientists better understanding of how oceans influence the climate.
10 May 2011, 01:37 PM ET
Morocco's desert sands provide a look at life's history on Earth … and maybe Mars, too.
09 May 2011, 03:24 PM ET
The mineral had never been found in nature before now.
09 May 2011, 11:52 AM ET
Astronauts see 16 sunrises & sunsets in one 24-hour orbital period.
07 May 2011, 05:53 PM ET
Astronaut Ron Garan snaps amazing photos of Earth from space and blogs about Earth's beauty on Fragile Oasis.
03 May 2011, 01:16 PM ET
This autumn, an asteroid the size of an aircraft carrier will zoom closer to Earth than our own moon, causing scientists to hold their breath.
21 April 2011, 05:24 PM ET
NASA astronaut Ron Garan's blog, Fragile Oasis, aims to inspire people to cherish the beauty and wonder of our planet Earth.
21 April 2011, 04:09 PM ET
NASA is hosting a variety of online activities to celebrate Earth Day 2011 on Friday (April 22).
14 April 2011, 02:57 PM ET
Holbox Island off the Yucatan Pennisula has waters so dark its name means "black hole" in Mayan.
13 April 2011, 02:36 PM ET
The Tigris and Euphrates rivers were part of the first views of Earth by space shuttle astronauts.
04 April 2011, 06:02 PM ET
Wadi Rum is an alien-looking landscape in Jordan.
01 April 2011, 12:35 PM ET
NASA's Kepler mission observatory has discovered found 1,235 potential alien planets so far. A new image puts them all together.
30 March 2011, 11:02 AM ET
NASA's Project Icebridge estimates show that Artctic sea ice has now melted back to 1/2 the size of the continental U.S. (3,717,813 sq mi). Scientists like Tom Wagner are investigating how much more will melt and when.
24 March 2011, 03:40 PM ET
Europe's GOCE mission to study the Earth's gravity field has begun a detailed analysis of the Earth's interior, shedding light on how continents move, to advance an early warning system for earthquakes.
24 March 2011, 01:59 PM ET
Structures thought of as the oldest known fossils of microbes might actually be microscopic mineral formations.