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Tornado Alley storm season starting and ending earlier
Peak tornado activity typically occurs in the region from early May to early July. It has moved an average of seven days earlier over the past six decades.
September 17, 2014
Racing toward Pluto, spacecraft spies tiny moon Hydra
The New Horizons spacecraft - due to encounter Pluto in July 2015 - has spotted Pluto's small, faint, outermost known moon, called Hydra.
September 17, 2014
Merging galaxies can produce disk galaxies
Astronomers thought mergers formed giant elliptical galaxies. Now, for at least 24 observed galaxies, mergers have formed flattened, circular disks of dust and gas.
September 17, 2014
New map of 15 years of CO2 emissions
An international research team has developed a new system to quantify 15 years of CO2 emissions, every hour, for the entire planet, down to the city scale.
September 17, 2014
Polar mesospheric clouds over the Ukraine
Astronauts aboard the International Space Station, flying at 350 kilometers (220 miles) up, are ideally placed to observe elusive polar mesospheric clouds.
September 17, 2014
A push for climbing reform after Sherpa deaths on Everest
In the wake of the deaths of 16 Nepalese guides on Mount Everest in April 2014, many groups push for reform of climbing expedition practices.
September 16, 2014
Earthquake-induced landslide at Seward Glacier
NASA scientists were in the right place at the right time this summer to capture photos of a fresh landslide, caused by an Alaska earthquake.
September 16, 2014
New catalog of visible Milky Way charts 219 million stars
Astronomers spent 10 years charting stars brighter than 20th magnitude – that's about 1 million times fainter than can be seen with the human eye.
September 16, 2014
Major Hurricane Odile slams Baja Peninsula in Mexico
Major Hurricane Odile struck the Baja Peninsula and left extensive damage and flooding across the area. Photos of the damage and firsthand reports, here.
September 16, 2014
Hurricane Odile
Hurricane Odile tied Olivia (1967) as the strongest hurricane to make landfall in Baja California in the satellite era.
September 16, 2014
