Paul Arnold

Mice often communicate in ultrasound, which is so high-pitched that it's beyond human hearing. Because these sounds don't travel very far, it was thought that they were only used for private, close-up conversations. New research ...

Hearing a baby cry can trigger a range of responses in adults, such as sympathy, anxiety and a strong urge to help. However, new research suggests that a deeper physical reaction is also occurring. A baby's cry, particularly ...

Navigating the extreme cold of deep space or handling super-chilled liquid fuels here on Earth requires materials that won't break. Most metals become brittle and fracture at such low temperatures. However, new research is ...

Climate change is driving more frequent and more intense wildfires around the world, including in the United States. These huge blazes cause a range of problems that affect health, the environment, property and the economy. ...

Our increasingly digitized world has a data storage problem. Hard drives and other storage media are reaching their limits, and we are creating data faster than we can store it. Fortunately, we don't have to look too far ...

Astronomers have discovered what they think may be another moon orbiting a distant dwarf planet called Quaoar. This small, icy, egg-shaped planet in the far reaches of our solar system, beyond Neptune, is already known to ...

When it comes to color, mammals are hardly the most vibrant creatures of the animal kingdom. Their fur often comes in drab shades of brown, gray or black, unlike some birds, insects or fish that can dazzle with brilliant, ...

Artists are always looking for new ways to create and express themselves. A growing trend is the use of multiple layers of see-through materials, such as Plexiglas, to create paintings that have real depth, transforming two-dimensional ...

For citizens of the ancient Roman Empire, a trip to the amphitheater meant a thrilling day of entertainment. However, for many of the gladiators and animals involved, it was a fight for survival. A new study published in ...

It's a familiar scene for many of us. A warm summer evening, a gentle breeze and then the inevitable high-pitched whine of a mosquito buzzing near your ear. For some, this is a fleeting annoyance, but for others, it means ...

In a breakthrough for next-generation technologies, scientists have learned how to precisely control the behavior of tiny waves of light and electrons, paving the way for faster communications and quantum devices.

A team of scientists from China and the U.S. is pioneering the development of bubble-powered robots, which could one day replace needles for painless drug delivery into the body. Inspired by nature, the researchers developed ...

Chinese researchers have developed a new carbon nanotube insulator that can withstand high temperatures up to 2,600°C, outperforming all other materials used for extreme-temperature applications. This breakthrough could be ...

One of the most effective ways we learn is through third-party imitation, where we observe and then copy the actions and behaviors of others. Until recently, this was thought to be a unique human trait, but a new study published ...

Steel truss bridges are a common sight on roads and railways around the world, with many dating back to the late 19th and early 20th centuries. Despite their high strength-to-weight ratio, which allows them to support heavy ...