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Deanna Conners
Photo via Daniel de Leeuw Photography

Why trees shed their leaves in the fall

Something to think about while raking.

Donnehue's Cave in Indiana. Image Credit: Sam Frushour.

Clues to ancient earthquakes in caves

Stalagmites on the floors of caves in southern Indiana contain evidence of past earthquakes, scientists say.

Photo via Manish Mamtani Photography

Why Earth has 4 seasons

Some assume our planet’s changing distance from the sun causes the change in the seasons. That’s logical, but not the case, for Earth.

Kit Delauriers describes her self as a ski mountaineer. Image via The North Face.

Tallest peak in the US Arctic is …

No one knew whether Mount Chamberlin or Mount Isto was taller. Now an aerial study – and a ski mountaineer – declare a winner.

Image via Hawai'i Volcanoes National Park

More than 450 volcanoes in Ring of Fire

The Pacific’s Ring of Fire has 75% of the world’s active and dormant volcanoes, plus it’s prone to powerful earthquakes. Here’s why.


Man-made chemicals in deepest sea

Scientists have detected persistent man-made chemicals in crustaceans from the Mariana Trench and Kermadec Trench, deepest parts of the ocean ever sampled.

Image via Juan Ramon Rodriguez Sosa/Flickr.

How fireworks get their colors

The colors in fireworks help create “ohhhhs” and “ahhhhs.” But what creates the colors?

ISS, as captured by Dave Walker

How to spot ISS in your sky

Check out the International Space Station in your night sky the next time it flies over. NASA’s Spot the Station program is easy, and it works!

Flowering Tree (Sirdavidia solannona). Image Credit: Thomas Couvreur.

Top 10 new species of 2016

From a giant tortoise to a tiny beetle and an early hominid, this year’s top 10 new species list contains some exciting finds.

Hurricane Alex as seen on January 14, 2016, by the the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Image via NASA Earth Observatory.

How do hurricanes get their names?

The Atlantic hurricane season started June 1. Here are the hurricane names for the 2016 season.