Robotic "Mars Dogs" could use artificial intelligence and sensors to investigate the Martian surface and map hidden lava tunnels.
Two dinosaurs that died in China during the Cretaceous were fossilized in 3D — but it probably wasn't a volcanic eruption that killed and preserved them.
Scientists investigated the unexplained booming sounds known as "Seneca Guns," heard near coastal North Carolina.
Scientists are modeling when Earth's next supercontinent phase will begin, and how that could affect global climate.
An army officer was among the first people to inspect wreckage of a so-called UFO crash in Roswell, New Mexico, and he may have recorded clues about what he saw in a journal.
Asian honey bees defend their hives by attaching animal dung around the doorways, a behavior that was previously unknown in bees.
From vanishing sea ice to blistering air temperatures to zombie fires, climate change is reshaping the Arctic. And that transformation may be permanent, researchers said.
Warmer-than-average conditions and declining sea ice in the Arctic may be linked to the Sahara Desert's biggest dust storm in recorded history.
Six volcanic islands in the Aleutian archipelago may be linked together in one massive caldera hiding underwater.
A stone inscription immortalized Roman emperor Septimius Severus' gratitude for a city's generous "donation" of 700,000 silver coins.
After two snapped cables damaged Arecibo Observatory's radio telescope beyond repair, the iconic instrument has collapsed.
In 1907, explorer Jørgen Brønlund died during an expedition in Greenland. Scientists recently gleaned new details about Brønlund's death from a mark in his diary.
Scientists have identified five locations that the extinct predator Megalodon used as "nurseries" for young sharks.
High-energy X-ray scans of an intact Egyptian mummy mapped a detailed glimpse of the bones and objects inside.
Rabbit-size rats from Eastern Africa are the only mammals on Earth that gain a poison defense from plants.
New analysis of jaws from a shark that lived 370 million years ago revealed a horrific twist (literally) to the predator's toothy grin.
Scientists recently calculated the power of so-called superbolts — brighter-than-average lightning strikes.
Infamous mobster Dutch Schultz allegedly buried millions somewhere in upstate New York, and treasure hunting teams are hot on the trail.
Archaeologists recently discovered the skeleton of a medieval soldier and his weapons at the bottom of a lake, the first such find in Lithuania.
Scientists recently documented never-before-seen mating behavior in wrinkle-faced bats, in which males pull a furry flap of skin over their faces.
A new census tracked down hundreds more copies from the first printing of Newton's pioneering science book "Philosophiae Naturalis Principia Mathematica," or the "Principia."
Bacteria carried by humidity from a family's indoor swimming pool sent a teen boy to the emergency room with severe breathing difficulties.
Archaeologists located the buried Viking ship and ritual center in Norway with ground-penetrating radar.