6,913 results
6,913 results for: Bears
- Health & Medicine
An experimental oral vaccine may prevent invasive bacterial diarrhea
Shigella causes about 450,000 U.S. infections each year. An experimental oral vaccine protected adults in a small human trial.
- 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.
- 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.
- 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.
- 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.
- Paleontology
A large fossil leg bone hints at T. rex’s origins, but scientists disagree
A new analysis of a large fossil shinbone suggests T. rex ancestors came from North America instead of Asia. Not everyone agrees.
- 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.
- 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.
- Animals
40,000-year-old woolly mammoth RNA offers a peek into its last moments
Ancient RNA from Yuka, a 40,000-year-old woolly mammoth preserved in permafrost, can offer new biological insights into the Ice Age animal’s life.
- 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.
- Health & Medicine
This baby sling turns sunlight into treatment for newborn jaundice
A student created a low-cost baby carrier that filters sunlight to safely treat jaundice where electricity and equipment are scarce.
- Animals
A wolf raided a crab trap. Was it tool use or just canine cunning?
Video from the Haíɫzaqv Nation Indigenous community shows a wolf hauling a crab trap ashore. Scientists are split on whether it counts as tool use.
