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In just two weeks, the Illinois based Brookfield Zoo has been forced to euthanize both of its African Lions.

The likely Leonardo da Vinci painting "Salvator Mundi" looks straightforward at first glance: a depiction of Jesus Christ in Renaissance-era clothing, raising one hand in blessing and holding a clear orb in the other. 

Scientists have created tiny machines comprised of biological materials that could one day heal our bodies or clean up the environment.

Scientists have digitally reconstructed the face of a Scottish woman who was scarred by leprosy more than 500 years ago.

A weird study that involved alligator corpses also turned up a bone-eating life form in the depths of the sea.

A full-scale nuclear war would likely trigger a worldwide period of cold and darkness that could spark a famine.

A startling new study suggests that Germany could have won a key battle in World War II and perhaps changed the outcome of the war if they had made a few small strategic changes.

Smoke from the devastating Australian bushfires will travel around the globe, according to data compiled by NASA.

The former director of NASA's Jet Propulsion Laboratory and the current project scientist for the Voyager program, Ed Stone, is pleading with the space agency to head toward Saturn's moon Enceladus in hopes of discovering life.

Experts have uncovered a painting beneath centuries of dirt in St. Stephen’s Cathedral in Vienna that may be the work of a famed Renaissance artist.

Astronomers have discovered an asteroid inside Venus' orbit that not only circles the sun, but is also the second closest object to the star in the solar system, surpassing Venus itself.

SAN FRANCISCO — A mysterious case of dying fish in the lower Congo River helped scientists discover that this body is the deepest river on the planet. It's also a place where raging rapids, powerful currents and even submerged "waterfalls" divide the water, much as mountain ranges can separate habitats on land.

The planet's wildlife is more and more living under the boot of humankind, a new study claims.

The Department of Defense has top-secret classified briefings and a classified video about a UFO incident.

A meteorite that fell 50 years ago in Australia contains stardust that formed 5 to 7 billion years ago -- the oldest solid material ever found on Earth -- scientists say.

For years, researchers tried to prove that Christopher Columbus's encounters with "cannibal marauders" during his trip to the Caribbean in 1492 were just myths. A new study, however, suggests that Columbus' stories were indeed the truth.

The wreck of a U.S. World War II aircraft has been revealed in stunning detail 77 years after it was lost off Oahu, Hawaii.

A photographer in the Swiss Alps has captured a remarkable image of an "ice halo," the moment ice crystals froze in mid-air, creating a halo effect around the Sun.

A mysterious underground chamber has been discovered under the palace of Roman Emperor Nero, a secret that had been kept for almost 2,000 years.

Mars may well have liquid water at or near its surface, but a new study suggests that water vapor is escaping the Red Planet faster than previously thought.