Water droplets on soap films orbited and merged like colliding galaxies, a technique that could help scientists study the cosmos.

Technologies, including chatbots, promise to make life easier. But removing the friction, or effort involved in thinking, has costs.

Female rats prefer gentler tickling, a finding that could reshape animal happiness research.

A 59,000-year-old Neandertal molar unearthed in Siberia was drilled with a stone tool – the earliest evidence of primitive dentistry.

Scientists still don’t know why Andes hantavirus is the only one shown to spread from person to person.