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A previously unrecognized type of immune cell may be responsible for the itchy feeling brought on by bug bites and other allergic reactions.

A NASA spacecraft erected a large, foil solar sail in orbit around Earth last week, after a failed attempt days earlier. However, subsequent observations of the spacecraft show it is "tumbling or wobbling" through space, which may have also impacted its trajectory around our planet.

About 40% of cats play fetch with their owners, but it's not clear why.

A helium reservoir with the highest concentrations ever seen could hold enough of the gas to address critical shortages in the U.S. affecting tech, medicine and space exploration.

Orcas off the coasts of Spain and Portugal may be using boats as targets to practice hunting their favorite food, Atlantic bluefin tuna.

Archaeologists in Kazakhstan have discovered 10 kurgans, or burial mounds, dating to the Middle Ages, and some have "mustaches."

Scientists in China have developed a tensor processing unit (TPU) that uses carbon-based transistors instead of silicon – and they say it's extremely energy efficient.

Tarantulas' hairy bodies protect against the scavenging, spider-eating army ants that clean their nests, scientists say.

The mapping of 50,000 mysterious "knots" in the human genome may someday lead to the development of new cancer drugs, researchers say.

Archaeologists remain uncertain about the purpose of these head cones, but it appears that ancient Egyptians associated them with "sensuality, sexuality and related notions."

The fort would have contained multiple buildings and was built sometime between the first and third centuries.