6,903 results
6,903 results for: Bears
- Climate
Polar bears in the Barents Sea are staying fat despite rapid sea ice loss
Polar bears can struggle to adapt to climate change. Bears on Svalbard may be surviving on land prey and seals — but scientists warn it may not last.
- Animals
Polar bears provide millions of kilograms of food for other Arctic species
A new study shows how much food polar bears leave behind — and how their decline threatens scavengers across the Arctic.
- Life
How these strange cells may explain the origin of complex life
The tiny pantheon known as the Asgard archaea bear traits that hint at how plants, animals and fungi emerged on Earth.
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The inner lives of animals
Editor in Chief Nancy Shute discusses how scientists are beginning to study animals’ emotions and personalities — from joy to individual temperament.
- Climate
Hurricane Melissa spins into a monster storm as it bears down on Jamaica
The story of Atlantic hurricanes is treading a familiar — and frightening — path: Climate change is fueling huge, slow-moving, rain-drenching storms.
- Planetary Science
A Mars rock analysis tool proved its mettle on a chance find from Arizona
On Mars, the Perseverance rover found a spotted rock that could bear signs of ancient life. On Earth, a researcher used a lookalike for a dry run.
- Paleontology
Crystallized dino eggs provide a peek into the tumultuous Late Cretaceous
Definitively dating the age of a clutch of fossil dinosaur eggs at a famous site in China may let scientists link eggshell features to environmental shifts at the time.
- Health & Medicine
How a bacterial toxin linked to colon cancer messes with DNA
A closeup look at colibactin’s structure reveals chemical motifs that guide its mutation-wreaking “warheads” to specific stretches of DNA.
- Animals
Cuddly koalas had a brutal, blade-toothed close cousin
Ancient collagen preserved in the bones of extinct Australian mammals is revealing their evolutionary relationships, leading to some surprises.
- Health & Medicine
Cancer treatments may get a boost from mRNA COVID vaccines
Cancer patients who got an mRNA COVID vaccine within a few months of their immunotherapy lived longer than those who did not, health records show.
- Life
Horses may have become rideable with the help of a genetic mutation
To make horses rideable during domestication, people may have inadvertently targeted a mutation in horses to strengthen their backs and their balance.
- Earth
Earth’s core may hide dozens of oceans of hydrogen
Hydrogen reserves in Earth’s core large enough to supply at least nine oceans may influence processes on the surface today.
