The 100-million-year-old sandstone slab of 70 mammal and dinosaur tracks from the Cretaceous period is one of the rarest ever discovered.

The space agency's $650 million Neo Surveillance Mission is designed to spot killer asteroids.

NASA astronauts make history with an all-female spacewalk — now that the spacesuit problem is resolved.

Scientists with NASA unveiled the first carbon maps obtained by the spacecraft, named the Orbiting Carbon Observatory-2, or OCO-2.

In continued efforts to track changes in glacial and sea ice, NASA's IceBridge plane has begun collecting data in Greenland.

The Spitzer Space Telescope is so sensitive it can see objects optical telescopes cannot. Here are some incredible images it has helped capture.

This week, NASA is paying tribute to fallen astronauts who lost their lives in the pursuit of space exploration by holding a remembrance ceremony today (Jan. 26

Astronaut Janice Voss, a veteran of five spaceflights and a former science director for a NASA exoplanet-hunting spacecraft, has died after a battle with cancer

NASA's space shuttles are gearing up to make their final voyages — this time flying piggyback a special Boeing 747 jet on the way to museum retirement homes.

Residents of the Big Apple may catch sight of an unusual sight over their famous skyline this week: a NASA space shuttle riding atop a jumbo jet.

Four astronauts are spending 12 days underwater to prepare new methods for working in outer space. And they're Tweeting about it.

Former astronaut Alan "Dex" Poindexter, 50, a space shuttle commander who flew twice into space, died on July 1 after being injured in a water sports accident i

NASA deployed a few high-flying paparazzi to Hollywood to scout out the best photo spots for next month's arrival of one of its biggest stars: space shuttle End

This week marks a somber time for NASA, with the anniversaries of three U.S. spaceflight disasters.

The Columbia space shuttle disaster in 2003 killed all 7 of its crew members, but a box of roundworms managed to survive the shuttle's disintegration.

NASA's first space shuttle, the test orbiter Enterprise, was named after the fictional starship on "Star Trek."

NASA lost power on Sunday in California, delaying the launch of the IRIS sun observatory by one day.

The last of NASA's retired space planes is officially on display for the public to enjoy.

NASA's Galaxy Evolution Explorer has been decommissioned after 10 years of data collecting on other galaxies and black holes.

Tuesday, Jan. 28 marked the 28th anniversary of the destruction of the space shuttle Challenger and loss of the crew.

Since the end of its space shuttle program, NASA is relying more and more on commercial space travel.

NASA astronaut Steven Nagel, who flew four space shuttle missions, died Thursday, Aug. 21. He was 67.

NASA's crash dummies are worlds tougher than their car-testing cousins.

This NASA image highlights wildfires, hurricanes and dust storms to show off the Earth's air quality.

An impact basin spotted on Mercury with two smaller craters above it looks remarkably like the sweet treat-loving Cookie Monster muppet of "Sesame Street" fame.

Spliced from thousands of screenshots of the planets, NASA has created a new video of Mercury that shows off the planet's diversity in terrain.

A video from a NASA spacecraft studying the sun has captured an unexpected sight.

A NASA spacecraft slammed into the surface of Mercury on Thursday, April 30, bringing a groundbreaking mission to a dramatic end.

The dream of a space-faring humanity is deep-rooted.

More than half of the world's largest aquifers are being depleted, according to satellite system data.

Thanks to massive water-diversion and salt-evaporation projects, satellite images show how the Dead Sea is gradually living up to its name.

NASA is pressing forward on assessing the value of a "human-tended waypoint" near the far side of the moon — one that would embrace international partnerships

An experimental, "green" NASA lander crashed during its first free-flight test on Aug. 9, erupting in a ball of flame when it hit the ground.

With the passing of its first major milestone, NASA is on track to replace its highly toxic fuel with a greener, more efficient one.

From fission and fusion to biomaterials, NASA hopes these innovations will benefit Earth and space science.

How exactly does turning a pillow into a big fluffy gadget help us disconnect from the world?

NASA is getting ready to launch a daring test flight of a capsule that could eventually bring humans to deep-space destinations like Mars or an asteroid.

Intriguing features photographed by NASA's Mars rover Curiosity probably don't have a biological origin, mission team members say.

The Beagle 2 Mars lander is clearly visible in new photos from NASA's sharp-eyed Mars Reconnaissance Orbiter (MRO) in orbit around the Red Planet.

The White House budget proposal for NASA in 2016 calls for a $500 million boost over the 2015 enacted budget and would keep NASA on its path to Mars.

To prepare for future colonies on Mars, NASA is asking for ideas on how to keep Red Planet astronauts safe that require minimal resupplies from Earth.

NASA aims to launch a flight test Thursday, June 4, of an innovative "flying saucer" that could help humans land on Mars in the future.

NASA's huge supersonic parachute isn't ready to land astronauts on Mars just yet.

NASA Administrator Charles Bolden says the agency's current goal of getting astronauts to Mars in the 2030s is eminently achievable

Space law prevents rovers from contaminating H2O on Mars.

Want to go to space? NASA is looking to hire a few good astronauts.

The space agency is trying to understand what vegetables may thrive on the red planet, and how to help them do so.

Former astronaut Buzz Aldrin says the $3.5 billion spent annually on the space station should go towards efforts to colonize Mars.

The space agency is planning to land its newest set of wheels on the Martian surface by early 2021.

The Mars InSight lander, developed to peer deep into the red planet's interior, is slated to launch on the morning of May 5.