By 2100, scientists believe Mars colonies would want to "phone home" to Earth, but could there be effective, secure call connections by then?
Guns kill many children than flu or asthma in the United States.
Cats have been domesticated twice. But as humans loved them for their usefulness, they also seem to like being around humans as well.
Global bleaching of reefs seems to have stopped, but there is no reason to celebrate.
Marijuana uses more water and energy than hospitals and commercial buildings. Cannabis growers now try to become environment-friendly and organic.
Baby foods and juices are found to be contaminated with lead, which can be harmful to the health of infants.
This Fathers' Day, it is time to appreciate animals that make great stepdads -- because they, too, deserve some love.
Texas-sized melt in Antarctica worries scientists.
Jupiter may be the oldest planet in the solar system, scientists say.
New studies reveal that the Sun may have had a pair that melted into the Milky Way.
The rare anomaly is only the 10th ever to be recorded in history, scientists say.