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Hand development is shaped by evolution, biology and environment. Cunaplus_M.Faba/iStock via Getty Images Plus

Why are our fingers different lengths?

Your fingers’ lengths are just one feature of many that let your hands grasp, press, pull and otherwise interact with the world.
Under the watchful eye of surveillance cameras, fans leave after the France-Senegal World Cup match in East Rutherford, N.J., on June 16, 2026. AP Photo/Ted Shaffrey

World Cup propels surveillance to new heights

The World Cup is bringing visitors and AI-driven surveillance systems, but only one of those is certain to leave when the games are done.
The active galaxy Centaurus A, with jets emanating from the central black hole. ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray)

Can you make a black hole in a laboratory?

An astronomer explains why artificial black holes are pure science fiction – at least for now.
Los coquíes jóvenes, invasores en Florida y Hawái, se enfrentan a un hongo patógeno que afecta a más de 500 especies de anfibios. Alberto López/flickr

¿Cómo las ranitas coquí jóvenes equilibran las demandas de crecimiento y de combatir enfermedades?

Un nuevo estudio rastrea cómo las ranas jóvenes equilibran la energía entre crecer y combatir infecciones.
Hatshepsut (c. 1505–1458 B.C.E.) was Egypt’s second female ruler. She often is depicted as a sphinx or wearing a beard, a traditional sign of pharaonic authority. G. Dagli Orti/De Agostini Editorial via Getty Images

Who was the first transgender person?

There is evidence of people who crossed gender boundaries even in ancient civilizations, though the terms naming them have evolved over time.