Earth's seasons look very different at locations not far from each other, 20 years' worth of satellite data reveals.

Some people in Ukraine weathered the harshest moments of the last ice age by creating shelters made partly of mammoth bones and tusks.

By directly communicating with the brain, a new wireless device could someday help restore lost senses or manage pain without medications, its developers say.

A small study reveals that cats greet male owners more vocally than female ones. But the findings could be a result of cultural norms among the participants, rather than a universal cat behavior, scientists say.

NASA's Mars Reconnaissance Orbiter spacecraft has just taken its milestone 100,000th photo of the Red Planet using its high-definition camera. It reveals a dark region of moving sand dunes.

A 2,000-year-old palace in the Republic of Georgia and a 1,500-year-old church in Iraq suggest Zoroastrians coexisted with people of other religions.