Astronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.

A figure commonly used to compare the risk of death from pregnancy compared with the risk of death from abortion might be based on outdated data, a new study suggests.

The carbon emissions of the world's biggest greenhouse gas emitter have plateaued for nearly two years.

The National Science Foundation's massive IceCube neutrino detector at the South Pole just got a major new upgrade, which promises to take the search for "ghost particles" to a new level.

A new vaccine design uses folded DNA to steer the immune system toward producing the rare immune cells needed to make protective antibodies against HIV.

The delicate gold ring was made sometime in the Middle Ages and may have belonged to a high-status woman.

Scientists hope to probe the nature of general relativity through a possible pulsar found in the center of the Milky Way, near a supermassive black hole.

If proven effective in humans, the vaccine could complement standard therapies for HPV-driven cancer, as well as inform the design of therapeutic vaccines for other diseases.

New research using a space-time phenomenon predicted by Einstein presents evidence that the invisible backbone of the universe may be much "fuzzier" than we realized.

An analysis of peatland soil samples and satellite images has found that wildfires on Alaska's North Slope are more frequent and severe now than they were at any point over the past 3,000 years.

The sewn hide, cordage and needles show how Indigenous Americans used complex technology to survive the freezing temperatures at the end of the last ice age and as a means of social expression.

A new polymer gel can deliver insulin through intact skin in animal tests. It could someday offer a path toward needle-free diabetes treatment, some say.

Huge-scale ecological engineering around the edges of one of the world's largest and driest deserts has turned it into a carbon sink that absorbs more CO2 than it emits, research suggests.

Scientists have identified the oldest mule remains ever found in the western Mediterranean.

Forty years ago, Voyager 2 flew past Uranus and observed radiation levels that defied explanation. Now, scientists may finally know exactly what happened.

A large, 20-year trial showed that speedy cognitive exercises could reduce the risk of Alzheimer's disease and other types of dementia. The question is, could these tasks be adapted into video games?

A small study hints that you can "trigger" memories of specific puzzles while a person dreams and that the dreamer may be more likely to solve the puzzle the next day.

New CT scans reveal the last moments of the Inca children who were sacrificed and mummified about 500 years ago.

Earth's core contains nine to 45 times more hydrogen than the planet's oceans do, according to a new study that could settle a debate about when and how hydrogen was delivered to Earth.

Archaeologists and student excavators uncovered a Viking Age pit full of dismembered remains near Cambridge, England.