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A retired researcher has detected an unusual pulse in the light of nearby stars while looking for signs of extraterrestrial intelligence. Aliens are one possible explanation for the strange signal, but as with every other unexplained space phenomenon, it's probably not aliens.

A gold ring with a red gemstone found in Israel dates to the Hellenistic period and may have been buried in a coming-of-age ritual.

Teeth are sensitive because they evolved from sensory tissue in both ancient vertebrates and ancient arthropods.

Researchers have recovered Homo erectus bones from the seafloor, which points to an unknown hominin population hunting on land that is now underwater in Southeast Asia.

New radio images reveal an unusually faint and symmetrical supernova remnant, nicknamed Telios, lurking just below the galactic plane of the Milky Way. However, they cannot tell exactly where it is, how big it is or how it formed.

A new analysis of a skeleton uncovered 50 years ago provides some of the earliest evidence of intergroup conflict between humans to date.

The world's second-biggest rat species — a gargantuan woolly beast — was caught on camera in the mountains of New Guinea.

A recent launch of China's Zhuque-2E rocket triggered a giant white streak of light to appear above at least seven U.S. states after deploying six satellites into low-Earth orbit. The light show, which was visible in at least seven states, was the result of a "fuel dump," experts say.

Amazon's Vulcan, the first warehouse robot with touch sensitivity, has begun operations in the company's Spokane, Washington, and Hamburg, Germany, fulfillment centers.

DNA analysis has revealed that 26 novel species of "extremophile" bacteria were lurking in a clean room that housed NASA's Phoenix lander before it was launched to Mars in 2007. The hardy microbes might be capable of surviving in space.

A man tore his windpipe, in part, due to hay fever.