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Kissing a romantic partner is a nice way to share an intimate moment - not to mention a hearty dose of saliva and tens of millions of oral microbes.

This week in science: Mysterious molecules on Mars are tricky to explain without life; a compound that cuts cholesterol as a daily oral pill; an experimental new treatment for sleep apnea has a 93 percent success rate; and much more! Memory Loss in . ...

If the animal kingdom is anything to go by, love is, indeed, a many-splendored thing.

Getting older might seem like a slow, gradual process - but research suggests that this is not always the case.

Archaeologists have discovered a 10,000-year-old site with rock art in Egypt's Sinai Peninsula, the country's Ministry of Tourism and Antiquities said Thursday.

The biggest planet in our Solar System just got a little smaller.

Some forms of dementia may not be confined to the central nervous system; they may not even begin in the brain.

Human sperm can swim through surprisingly viscous fluids with ease - and they seemingly defy Newton's third law of motion to do so.

Scientists have taken a major step toward treating spinal cord injuries that cause paralysis.

NASA is set to launch four astronauts to the International Space Station on Friday, replacing a crew that was evacuated early due to a medical issue.