Horse riding played a key role in human expansion and civilization. But when and how did people first master these animals? Scientists use archeology and genetics to uncover clues about the first horse riders and how they shaped the world.

Paradise, California's Camp Fire accelerated as it moved uphill. U.S. Department of Agriculture scientists conduct an experiment to discover why.

The Camp Fire, which began on Nov. 8, 2018, was the deadliest and most destructive wildfire in California history to date.

After the largest and deadliest wildfire in California's history to date scorches Paradise, California, a resident returns home and witnesses the Camp Fire's destruction firsthand.

As the Camp Fire scorches a community in Northern California, residents leave by car and on foot. Their journey is captured on harrowing cell phone videos.

The California wildfires of 2018 took a worrisome trend to a new extreme, claiming scores of lives and over a million acres. Scientists investigate how forestry practices, climate change, and drought may contribute to the rise of deadly megafires.

Many Muslim women are not permitted to be home alone with a male who is not a family member, making it tough to schedule home repairs. Now, in Jordan, billions of gallons of already-scarce water is being lost to leaky pipes. In an effort to take matters into their own hands, many Muslim Jordanian women are learning to do their own plumbing.

As the Dead Sea shrinks, engineers prepare a daring solution: connect it with the Red Sea by way of a massive desalination plant. If it works, it could stabilize the legendary lake and ease regional tensions. But will it put the environment at risk?

A mass of fossilized fish, uncovered in North Dakota, appear to preserve the catastrophic fallout of the asteroid impact that wiped out the dinosaurs.

When a ball traveling through the air is spinning, some physics known as the magnus force kicks in to make it bend or curve. The magnitude of the magnus force depends on the ball’s rate of spin as well as its mass, velocity, radius, and the density of the air around it.

How do we see objects? By intercepting waves of light bouncing off of them and into our eyes, each reflected at a different angle. One way to achieve invisibility is to bend the paths of light using lenses, mirrors, or metamaterials with unique reflective properties. There are a lot of problems still to be solved—and valuable applications awaiting those who succeed.

In 2017, scientists were using a telescope in Chile to hunt for Planet X, thought to be far beyond Pluto. But Jupiter came into view along with 12 never-before-seen moons, bringing the gassy giant’s current total moon count to an astonishing 79.

Some people hunger for power, others are corrupted by it, and some are defined by it. But what does power do to our brains and bodies? Individuals with less power are more reliant on other people to meet their needs— so their brain pathways activate to help them understand the people they’re relying on. In contrast, those that feel powerful have a more adaptive way of handling stress.

Deepfakes are an increasingly popular editing technique that uses artificial intelligence to alter faces and voices in videos. Part of the name comes from the AI used to create them, deep learning. Similar technology has been used in Hollywood for years, but with AI getting better and more accessible, today they’re all over the internet.

Nicotine addiction came with high price for one teen, and he’s not alone. Increasingly popular vape devices like JUUL pose health risks and harm developing brains.

Wally “Wallace” Broecker, a pioneer of climate science, explains why he wishes he could have lived another 50 years.

After Ethiopian flight 302 fell from the sky, marking the second Boeing 737 Max 8 crash within 6 months, experts weigh in on what may have happened.