The idea of a multiverse — multiple realms of space differing in basic properties of physics — bugs some scientists. Others find it a real possibility that should not be ignored.
By Tom Siegfried
Ancient rocks suggest that ice entirely covered our planet on at least two occasions. This theory may help explain the rise of complex life that followed.
Researchers probe the weather-like physics of deadly infernos
After 100 years as a national park and eons as a geological wonder, the American icon continues to reveal layers of its past and of the landscape ahead
The theory of “pebble accretion” explains how infant worlds got so big so quickly
By Alexandra Witze
Returning to designs abandoned in the 1970s, start-ups are developing a new kind of reactor that promises to be much safer and cleaner than current ones.
Space oddities may help reveal dark matter and other secrets in the Milky Way. Astronomer Warren Brown explains.
Clues hidden in today’s orbits hint at the violent origins of the solar system — and a rogue giant kicked out long ago.
Passing chunks of ice can fertilize ocean waters and play a role in the planet’s carbon cycle
By Lindzi Wessel
SLIDESHOW: Also at risk are the many hidden habitats built into the sea’s frozen wilds.
We can readily manipulate all kinds of objects; for them, versatility is a huge struggle. They need better mechanics — and a lot more of the intelligence that goes into handling things.
Three years since New Horizons’ pioneering flyby, scientists consider how the probe has revolutionized our understanding of the dwarf planet’s atmosphere and mega-seasons
Geologists explore the rise of the Andes, whose high-altitude peaks and plateau alter global climate.
From rocket thrusters to shoe soles, additive technologies expand their sights
Materials that manipulate light and sound in ways not seen in nature may be ready for prime time, improving imaging and communications
Global warming and agricultural runoff have driven the loss of oxygen in oceans around the world, with looming ecological consequences.
The world’s earliest aeronauts possess a panoply of adaptations to help them navigate the skies.
The mass die-offs of Earth’s past may hold clues to our future
A “policy physicist” explores practical ways to sniff out uranium processing from afar
Colliding neutron stars sent out a gravitational wave as well as new clues about where gold, platinum and other atoms are forged.
Our mark on Earth is so profound that some argue it’s time to bid goodbye to the current geological time period — the Holocene — in favor of a new one: the Anthropocene.