WASHINGTON At a time when China is working on an ambitious lunar program, President Donald Trump vowed on Monday that the United States will remain the leader in space exploration as he began a process to return Americans to the moon. | Video
WASHINGTON Scientists have unearthed in New Zealand fossil bones of what might be the heavyweight champion of the penguin world, a bird nearly 6 feet tall (1.77 meters) that thrived 55 to 60 million years ago, relatively soon after the demise of the dinosaurs.
WASHINGTON Ticks, the notorious disease-spreading parasites, have been making life miserable far longer than human beings have walked the Earth. Even dinosaurs felt their blood-sucking wrath.
BERLIN Europe launched four more Galileo satellites on Tuesday, taking the number in orbit to 22 and moving a step closer to having its own navigation system, lessening its dependence on the U.S. Global Positioning System, or GPS.
WASHINGTON The oldest and most distant black hole ever observed -- a celestial brute 800 million times more massive than the sun -- is providing scientists some surprises about the nature of the universe when, on a cosmic scale, it was a mere toddler.
WASHINGTON A strange turkey-sized, bird-like dinosaur that boasted a swan's neck, arms resembling flippers, long legs and a mouth full of needle-like teeth staked out a unique amphibious lifestyle in rivers and lakes about 75 million years ago in Mongolia.
LONDON Rodents have joined mosquitoes in the cross-hairs of scientists working on a next-generation genetic technology known as "gene drive" to control pests.
WASHINGTON Melting Arctic sea ice could render sun-soaked California vulnerable to a recurrence of the severe drought suffered in recent years as it is likely to cause high pressure systems that push away rain-bearing storms, a study released on Tuesday said.
SINGAPORE Researchers in Singapore have built an underwater robot that looks and swims like a manta ray, using only single motors and flexible fins to propel it through water in a manner uncannily like its biological cousin. | Video
WASHINGTON A dazzling discovery in northwestern China of hundreds of fossilized pterosaur eggs is providing fresh understanding of these flying reptiles that lived alongside the dinosaurs including evidence that their babies were born flightless and needed parental care.