feed info

147,426 articles from ScienceDaily


Fossil snail shells offer new tool for analyzing ancient ocean chemistry

A collection of fossil shells from marine snails and clams is challenging a theory that says the world's deadliest mass extinction was accompanied by severe ocean acidification. The study is the first to use shells from fossilized mollusks to investigate ocean chemistry, demonstrating a new tool that scientists can use to study the conditions of the planet's deep past.

Getting in gear: Researchers create a slow light device with high optical quality

Researchers have created a gear-shaped photonic crystal microring that increases the strength of light-matter interactions without sacrificing optical quality. The result is an on-chip microresonator with an optical quality factor 50 times better than the previous record in slow light devices that could improve microresonators used in a range of photonics applications, including sensing and...

Farther or faster? Both improve distance running performance

A study compared two-week blocks of low-intensity training and high-intensity interval training in terms of performance and recovery. Both methods can improve endurance performance in recreational athletes after already two weeks when the training load is increased significantly from what the individual is accustomed to.

Physical activity protects against type 2 diabetes by modifying metabolism

Regular physical activity significantly changes the body's metabolite profile, and many of these changes are associated with a lower risk of type 2 diabetes, a new study shows. The study population included more than 7,000 men who were followed up for eight years. Men in the highest physical activity category had a 39% lower risk of type 2 diabetes than men who were physically inactive.

Using nanodiamonds as sensors just got easier

Researchers adapt excited state lifetime thermometry to extract temperatures of nanoscale materials from light emitted by nitrogen vacancy centers in individual nanodiamonds. The approach is less complicated, more accurate and safer for sensitive materials or biological tissues than OMDR.

Ancient ice reveals mysterious solar storm

Through analysis of ice cores from Greenland and Antarctica, a research team has found evidence of an extreme solar storm that occurred about 9,200 years ago. What puzzles the researchers is that the storm took place during one of the sun's more quiet phases -- during which it is generally believed our planet is less exposed to such events.

Scientists regrow frog’s lost leg

Scientists have triggered long-term growth of legs in adult frogs, which are naturally unable to regenerate limbs. The frogs regrew a lost leg over months, triggered by just 24 hour exposure to a five-drug cocktail held under a bioreactor. The new legs were functional enough to enable sensation and locomotion.

Screening study IDs inhibitor of key COVID virus enzyme

A study reports the discovery of a molecule with significant potential to disable the COVID-19 virus. The molecule was identified using high-throughput virtual screening -- a search through a library of 6.5 million in-stock compounds that could quickly be scaled up for drug production using some of the nation's most powerful supercomputers and other research tools.