Defense
How Many Nuclear Weapons Exist, and Who Has Them?
Nuclear states admit to owning about 13,000 warheads, but the real number could be higher
Stories by LiveScience
Animals
Packs of Hunting Spiders Are Guided by Web Vibrations
The movements help the arachnids synchronize their attacks
Archaeology
Legendary Shipwreck of Shackleton’s Endurance Discovered in Antarctic Waters
The discovery of the wreck is “a milestone in polar history,” says the director of the search for it
Ecology
Millions of Palm-Sized Flying Spiders Could Invade the East Coast
A huge invasive spider from East Asia that swarmed Georgia could soon take over most of the U.S. East Coast, a new study has revealed
Dinosaurs
‘Frozen in Place’ Fossils Reveal Dinosaur-Killing Asteroid Struck in Spring
Clues to the season of impact lingered in delicate fish fossils
Health Care
Surgeons Transplant Pig’s Heart into Dying Human Patient in a First
It was a last-ditch effort to save a Maryland man’s life
Astrophysics
Astronomers Report a Monstrous Eruption from a Supermagnetic Star
In a fraction of a second, the outburst released as much energy as our sun produces in 100,000 years
Animals
Newfound Millipede Breaks World Record for the Most Legs
It’s a millipede, literally
Geology
Thousands of Tiny ‘Ice Needles’ May Explain Mysterious Stone Patterns on Earth ... and Mars
These stunning patterns have an unlikely designer
Planetary Science
Meteorite Crashes into Woman’s Bed in Canada
The woman awoke to find the space rock laying next to her head
Dinosaurs
Some Dinosaurs May Have Wagged Their Tail to Help Them Run
This may be for the same reason humans swing their arms when walking and running
Paleontology
Kids’ Fossilized Handprints May Be Some of the World’s Oldest Art
Ice age impressions in limestone show that human ancestors inhabited the area
Space Exploration
China Wants to Build a Mega Spaceship That’s Nearly a Mile Long
A proposal plans to study how to build a giant spacecraft
Animals
Why Tiny Tardigrades Walk like Insects 500,000 Times Their Size
Animals this small and squishy usually don’t have legs
Natural Disasters
Congo’s Mount Nyiragongo Volcano Erupts, Sending Thousands Fleeing
The peak is one of the world’s most active volcanoes, last erupting in 2002
EARTH
World’s Largest Iceberg Breaks Off of Antarctica
The chunk of ice is larger than the state of Rhode Island
Space & Physics
Physicists Edge Closer to Taming the Three-Body Problem
A new model cuts through the chaos to reach the best-yet predictions of complex gravitational interactions
Black Holes
Magnetic Field around a Black Hole Mapped for the First Time
Images from the Event Horizon Telescope reveal new details of how supermassive black holes produce huge jets of matter and energy
Space & Physics
Why Does DNA Spontaneously Mutate? Quantum Physics Might Explain
A phenomenon called proton tunneling could account for point mutations in strands of genetic material
Biology
This Sea Slug Can Chop Off Its Head and Grow an Entire New Body—Twice
It is one of the “most extreme” examples of regeneration ever seen
