New type of aurora revealed in 19-year-old video

Scientists call it a "diffuse auroral eraser." That's because this newly named aurora first appears as a bright stripe over a diffuse auroral background. Then, when it disappears, it scrubs out the faint auroral light behind it.

Sharks navigate using Earth’s magnetic field

Longstanding mystery solved! New research shows that - just as lobsters, turtles and some birds do - sharks navigate using Earth's magnetic field,

The Brood X cicadas are emerging now

Some areas of the United States are starting to report the emergence of the Brood X cicadas after their 17-year absence.

How jellyfish swim

Check out the videos in this post to see the hypnotic pulse of swimming jellyfish. Their gentle movement belies a complex flow of water that make these creatures highly energy-efficient swimmers.

Warmer ocean temperatures may decrease Saharan dust crossing the Atlantic

Every year millions of tons of dust from the Sahara Desert are swirled up into the atmosphere and carried across the Atlantic. Research suggests that, as the climate changes, Saharan dust transport will decrease.

Climate has shifted axis of Earth, says study

New research suggests that loss of water on land through ice melting and human-caused factors is changing the movement of Earth's North and South Poles.

More than 5,000 tons of space dust fall to Earth each year

Dust shed from comets and asteroids constantly rains down on our planet. How much of this extraterrestrial material lands on Earth’s surface?

Is there such a thing as earthquake season?

Researchers have found a connection between earthquakes in Taiwan and its dry and rainy seasons.

Martin Rees and Frederick Lamb on humanity’s fate

From nuclear weapons to biowarfare to cyberattacks, humanity has much to overcome. Martin Rees and Frederick Lamb discuss the obstacles we must face as we look forward to humanity's future on Earth.