Paul Arnold

Superconductors are materials that conduct electricity with no resistance and expel magnetic fields when cooled to ultralow temperatures. And depending on their quantum structure, they can also showcase strange properties ...

Earth's poles do not always stay in the same place. For example, a region once near the North Pole can end up near the equator, and an area near the equator can shift up toward the pole. This is known as true polar wander ...

Watermarks have long protected everything from bank notes and fine art to digital photographs and software, helping prove authenticity and trace an object's origin. Their main function is to protect copyright and verify authenticity.

During puberty, as boys transition into men, the dramatic drop in their vocal pitch has sparked a long-running debate among scientists. Why did such deep voices evolve in the first place? Was it to attract female mates or ...

When it came to religious education in ancient Babylonia, in what is now Iraq, students had a lot to learn, ranging from the names of gods to their divine characteristics. A new study published in the journal Iraq has taken ...

We are used to seeing images of humanoid robots clumsily walking, stumbling over objects and awkwardly freezing in place. Struggling with real-world movement is one of the biggest drawbacks of current robotics. But now a ...

For centuries, a life-size petroglyph has stood over the rocky landscape of Miseeda in northern Sudan. Exactly who the figure carved into a granite hill represents remains uncertain, but researchers suspect it may depict ...

While not quite a fatal attraction, the gravitational pull of the moon and sun creates tiny stresses on Earth that can trigger events known as slow earthquakes. These are movements along fault lines (fault slips) that release ...

There's big news from the quantum world. A quantum computer has been used in space for the first time. The device was aboard a spacecraft in low Earth orbit and demonstrated technology that could eventually help solve a problem ...

In a shallow cave high on a cliff in Chalcatzingo, Mexico, scientists documented three red glyphs in the 1980s, but the paintings received relatively little attention. Fast forward to the present day, and researchers have ...

Some advances in AI technology are undoubtedly positive, like helping write code faster or discovering new medicines. But others can give us pause for thought.

Since 1995, archaeologists have excavated hundreds of human bones from Göbeklitepe, an archaeological site in southeastern Türkiye. The ancient remains are around 10,000 years old and date to a time when humans were beginning ...

Chronic hepatitis B is a long-lasting condition caused by the hepatitis B virus (HBV) that affects about 240 million people worldwide. Most people infected show no symptoms for years, but when symptoms do appear, they can ...

In 2022, the eruption and collapse of an underwater volcano in Tonga caused a devastating tsunami that killed four people, disrupted seafloor ecosystems and damaged critical seafloor telecommunications cables. It was one ...

For many of us, the last—and only—time we've seen a walking hand was Thing in "The Addams Family" movies or TV series. Now there's another. Engineers from the Soft Robotics Lab at ETH Zurich have adapted an off-the-shelf ...