Stories by Denise Chow

The high levels may help the seals survive their long, deep dives

The algae, once thought to be an introduced species, can form thick mats that alter ecosystems

The ship had been carrying gold to New York City when it sank in 1857

Although pilots may be thousands of miles away from the battlefield, a former drone pilot says distance doesn't numb the emotional impact of taking a life

Researchers used CT scans to make 3-D reconstructions of the fossilized nervous system

High rates of tooth growth helped sauropods eat vegetation, scientists say

Radar images from Cassini probe cast some light on Titan's mysterious surface

Snow cover across the Rockies has been shrinking since 1980. This meltwater accounts for 80 percent of the annual water supply for more than 70 million people in the U.S.

Decades after Apollo 13, NASA engineers and astronauts can still improvise solutions for sticky situations in space

The MAVEN mission will investigate Mars's upper atmosphere, in an attempt to understand what caused it to disappear

Two Congressmen expressed concern that the 2013 budget proposal takes away from NASA's robotic missions to Mars

A potentially habitable alien planet has been found orbiting a nearby star

Competing with Jeff Bezos, Richard Branson and Elon Musk, Allen and his company aim for a first operational launch in 2016

The report stresses the importance of stricter guidelines for the release of lunar materials to researchers, and more meticulous inventory procedures

The best way to view the Leonids is to face the darkest part of the sky, away from the moon and the constellation Leo

NASA astronaut Dan Burbank and Russian cosmonauts Anton Shkaplerov and Anatoly Ivanishin blasted into orbit on board a Russian Soyuz TMA-22 spacecraft

Researchers will use the data collected throughout the Mars500 mission to better understand the physical and psychological challenges that astronauts will face on long-duration missions

The exact timing and location of ROSAT's atmospheric reentry are uncertain

More than 50 new alien planets—including one so-called super-Earth that could potentially support life—have been discovered by an exoplanet-hunting telescope

For instance, for two decades, the general public was able to obtain car passes to visit KSC and watch a shuttle launch, but this was never resumed after the attacks

New photos from NASA's Lunar Reconnaissance Orbiter show the Apollo moon landing sites in high-resolution, revealing details that could solve historical mysteries about the first manned moon landings

NASA astronaut Ron Garan photographed a "shooting star" from the International Space Station

The Dawn spacecraft is returning close-up views of the pockmarked asteroid

The site is a giant crater called Gale, thought to harbor clues of ancient water activity on the Martian surface