Paul Arnold

Evolution is all about trade-offs. Traits that may be beneficial in one situation may backfire in another. Over millions of years, species can become specialized for one way of living rather than being equally good at everything. ...

Human sacrifice was deeply ingrained in Inca civilization. Children and young people were selected for sacrifice to appease the gods and sacred mountain spirits. Being chosen was considered a great honor for both the victims ...

For years, scientists have known that the heart has its own network of nerves, the intrinsic cardiac nervous system (ICNS), sometimes called its "little brain." Exactly how it functions has remained something of a mystery, ...

Implanted medical devices are instruments placed surgically in the body. Many are battery-powered or can be wirelessly recharged. While they can be lifesavers, they are not without problems. They can run out of battery power, ...

Moss may well be something that most of us barely give a second thought, but there is far more to this small nonvascular plant than meets the eye. A new study published in the journal Royal Society Open Science reports that ...

On Aug. 5, 2026, an abandoned piece of space junk is predicted to crash into the moon near a spot called Einstein Crater. Astronomers will be watching because the collision and aftermath may be visible from Earth.

Researchers in China have unveiled a new robotic exosuit driven entirely by soft artificial muscles instead of traditional motors. This technology could make it easier for older adults, injured patients or factory workers ...

Why do some brains survive long after death when most other soft tissue decays? That's the question a research team led by Alexandra Morton-Hayward at the University of Oxford set out to answer.

Most of us would like to hang around on the planet for as long as possible, and thankfully, lifespans in many countries are increasing. Scientists are also developing a new field known as longevity medicine, which aims to ...

Honeybees do not like cold weather. When temperatures dip, they can become sluggish and unable to fly. But no matter the conditions in the outside world, they try to keep their hives close to a comfortable 34°C–36°C (93°F–97°F). ...

In a research lab at the University of Tokyo, scientists have developed a new kind of glue. It's incredibly strong and highly stretchable, yet it washes away completely with a little alcohol.

Multiple sclerosis (MS) is a chronic autoimmune disorder that attacks the central nervous system. For years, Epstein-Barr virus (EBV) has been strongly linked to MS, as nearly every person diagnosed with the condition shows ...

In the mid-19th century, the remote island of St. Helena, located about 1,200 miles (1,900 kilometers) off the southwestern coast of Africa, became a receiving point for thousands of enslaved Africans rescued from illegal ...

Playing board games can be fun, challenging, infuriating and a great way to pass the time. They can also help scientists understand how we solve new problems.

Paleontologists in China have discovered the oldest chemically verified amber ever found, dating to 385 million years ago. That's approximately 140 million years before dinosaurs roamed Earth. The previous record holder was ...