The signature feature of black holes is that they are black — objects which fall into the hole can no longer be seen and can no longer influence the outside Universe. In classical general relativity, ...

A 3,500-year-old suit of Mycenaean bronze armor from the Greek village of Dendra may have been used in battle, not just for ceremonial purposes as previously thought. One of the oldest known suits of ...

Cats and many other animals can reflect light from their eyes. That’s why their eyes will usually shine brightly in photos taken in a dimly lit room or glow when illuminated in the dark by a ...

Researchers from Lanzhou University in China have shown that the slime mold Physarum polycephalum is able to solve the Traveling Salesman Problem, a combinatorial test with exponentially increasing ...

Around 12,800 years ago, Earth collided with fragments of a disintegrating comet, triggering Younger Dryas climate change; this event created environmental conditions at Abu Hureyra, Syria, that ...

A team of marine biologists led by a Florida International University researcher has described a new species of the shark genus Sphyrna from the Caribbean and the Southwest Atlantic. Named for the ...

Archaeologists in Bolivia have discovered an ancient complex roughly 215 km (130 miles) south-east of Tiwanaku’s historical site, where a large, modular building with an integrated, sunken courtyard ...