A study of more than 3,000 genomes has traced a gene mutation that confers HIV resistance to a person who lived near the Black Sea around 7000 B.C.

A likely source of contamination has been identified in an ongoing Listeria outbreak affecting California and Nevada.

By studying seismic waves, researchers have found a layer deep beneath the surface of Mars that could contain enough liquid water to flood the planet with an ocean thousands of feet deep.

A river that drained the slopes of a now-vanished volcano may have carved Yosemite Valley's depths during the last 10 million years.

Despite the deep ocean floor coating some 66% of our planet's surface, we haven't explored 99.999% of it, study finds.