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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.

Tenets of quantum mechanics and special relativity, among other theoretical ideas, lead inexorably to string theory.

Africa's Turkana Rift Zone, a hotbed of hominin fossils, is caught in the act of "necking," a critical transition toward continental breakup.

Male primates may be larger than females partly because of pressure from rival groups, not just competition with males inside their own group.

Mathematical analysis suggests that melodies and harmonies have become less complex as music evolves and musicians find new ways "to create great music."

Donated uteruses transplanted into women without a womb can allow for successful pregnancy and birth.