Study evaluates how to eliminate telemedicine's virtual waiting room

Study examines why the memory of fear is seared into our brains

Study: Spain’s Cueva de Ardales Was Used by Ancient Humans for Over 50,000 years

Uranus and Neptune are slightly different shades of blue because, although both condense methane in their upper atmospheres into falling snow, Neptune’s more active atmosphere means the methane snow falls more efficiently than it does on Uranus, giving Neptune a bolder blue color.