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
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.
SLIDESHOW: Also at risk are the many hidden habitats built into the sea’s frozen wilds.
The theory of “pebble accretion” explains how infant worlds got so big so quickly
By Alexandra Witze
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.
Passing chunks of ice can fertilize ocean waters and play a role in the planet’s carbon cycle
By Lindzi Wessel
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.
Scientists make progress in mapping the hidden force behind the watery eruptions
Astronomer Lisa Kaltenegger reckons the galaxy could contain as many as 40 billion habitable planets. Here, she speaks about the search for those faraway worlds and signatures of life.
The cold, finicky science of ice crystal formation
Nanospheres that react with their surroundings to propel themselves might find applications in drug delivery