Paul Arnold

A new study may be about to rewrite a part of our early human history. It has long been thought that Homo habilis, often considered the first true human species, was the one to turn the tables on the predator–prey relationship. ...

Our bodies do not age at a uniform rate. The speed at which one organ ages can differ greatly from another due to a range of lifestyle, environmental and genetic factors. Conventional tests provide a single number for overall ...

Zebra finches have a more complex way of communicating than previously thought. A new study published in the journal Science found that the sociable songbird does not just recognize and organize different calls based on how ...

A new study has made a counterintuitive discovery about how El Niño affects India's summer monsoon. Instead of reducing rainfall overall and causing widespread droughts, the periodic climatic phenomenon increases rainfall ...

Archaeologists in Egypt have discovered a 3,300-year-old whistle made from a cow's toe bone, believed to have been used by police to guard royal tomb workers. The artifact was found in the ruins of the ancient city of Akhetaten ...

Many companies across the world use carbon credits as part of their climate strategies to offset emissions. A carbon credit is a certificate that represents the reduction, avoidance or removal of one ton of carbon dioxide ...

Artificial intelligence is getting smarter every day, but it still has its limits. One of the biggest challenges has been teaching advanced AI models to reason, which means solving problems step by step. But in a new paper ...

Artificial intelligence may well save us time by finding information faster, but it is not always a reliable researcher. It frequently makes unsupported claims that are not backed up by reliable sources. A study by Pranav ...

Scientists may be a step closer to solving the mystery of Siberia's giant exploding craters. First spotted in the Yamal and Gydan peninsulas of Western Siberia in 2012, these massive holes, known as giant gas emission craters ...

Malaria is one of the world's most widespread and deadliest parasitic diseases. But some people may have natural protection thanks to DNA inherited from an extinct group of archaic humans known as the Denisovans. New research ...

For most of us, ice is a hazard. Whether it's making roads dangerously slippery or covering our sidewalks, this frozen form of water is something we often try to avoid. Yet, a discovery suggests that bending ice and adding ...

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. ...