On the day of the equinox, the center of the sun would set about 12 hours after rising – given a level horizon, as at sea, and no atmospheric refraction.
June through August 2014 is the warmest period recorded since record keeping began in 1880, NOAA says. Also, the warmest August since 1880.
Lethal aggression is something that chimpanzees naturally do, the study says, regardless of whether human impacts are high or low
As Voyager 1 left Earth on September 18, 1977, it looked back and acquired a stunning image.
Lava flow on the northeast side of Kilauea – Hawaii’s most active volcano – is setting trees and shrubs in its path on fire, but the fires are not spreading officials say.
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.
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.
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.
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.
Major Hurricane Odile struck the Baja Peninsula and left extensive damage and flooding across the area. Photos of the damage and firsthand reports, here.
Spinosaurus was the largest known predatory dinosaur to roam the Earth. Scientists now say that it was also the first truly semiaquatic dinosaur.
The most recent rise in carbon dioxide is the largest annual change seen for this gas since 1984.
The startling results of a new survey include 17 previously unknown monuments and dozens of burial mounds surrounding Stonehenge.
Cloud streets are long rows of cumulus clouds that are oriented parallel to the direction of the wind. Check out these cool images!
Evolutionary biology can explain skunks’ striking appearance, but only chemistry can get rid of the smell.
The recent volcano eruptions in Iceland have created enormous circular depressions in two of the country’s glaciers.
In case you missed it! Photos of the 2014 Harvest Moon from EarthSky friends.
The Montreal Protocol put the brakes on ozone-depleting chemicals 30 years ago. But one compound is still abundant in Earth’s atmosphere. Where’s it coming from?
In a conservation success story, the number of California blue whales has rebounded to near historical levels after being hunted to near extinction.
Saturday, September 6, 2014, is the first World Shorebird Day. How to participate, here.
Researchers have uncovered a 77-million year old, plant eating, super-massive Titanosaur. The huge animal weighed as much as a herd of elephants.