Three Siberian tigers rescued in Lebanon from an attempt to smuggle them into war-ravaged Syria were being resettled to France on Tuesday, an animal rights group said.

The White House has championed a new era of U.S. leadership in space, but its aspirations are complicated by tight budgets, vacancies in top posts and the rising role of private industry in aerospace innovation, experts say.

During a speech Thursday at NASA's Kennedy Space Center, Vice President Mike Pence delighted hundreds of space agency employees and contractors by pledging that "under President Trump, we will achieve more in space than we ever thought possible," including a "return to the Moon" and "American boots on the face of Mars."

European scientists said Thursday they have discovered a new subatomic particle containing a never-before-seen combination of quarks -- the most basic building blocks of matter.

A massive asteroid strike that wiped out the dinosaurs millions of years ago created room for frogs to colonize the Earth, said a study Monday that shows how frogs became among the most diverse vertebrates in the world.

As many as 10 types of frogs are believed to have survived the mass extinction some 66 million years ago, which erased three-quarters of life on Earth, said the report in the Proceedings of the National Academy of Sciences.

Dutch scientists on Monday celebrated the discovery of only the sixth meteorite found in recent history in The Netherlands, which at 4.5-billion years old may hold clues to the birth of our solar system.

(By Gary Li, Ph.D. Candidate in Mechanical and Aerospace Engineering, University of California, Los Angeles)

Nearly 50 years after landing on the moon, mankind has now set its sights on sending the first humans to Mars. The moon trip took three days; a Mars trip will likely take most of a year. The difference is in more than just time.

Europe has approved the launch of a deep-space observatory to sniff out habitable planets in other star systems, along with any life forms they may host.

Letters written by Albert Einstein about God, Israel and physics fetched nearly $210,000 at a Jerusalem auction Tuesday, with the highest bid going to a missive about God's creation of the world.

The question underlies an inventive and challenging new exhibition in New York that explores the fundamentals of sound and how they relate to the quest to understand the self and the cosmos.

China successfully launched on Thursday its first X-ray space telescope to study black holes, pulsars and gamma-ray bursts, state media reported. 

A Long March-4B rocket carried the 2.5-tonne telescope into orbit from the Jiuquan Satellite Launch Center in northwest China's Gobi Desert at 11:00 am (3:00 GMT), according to the official Xinhua news agency.