324 articles from WEDNESDAY 2.6.2021

Culture drives human evolution more than genetics

Researchers found that culture helps humans adapt to their environment and overcome challenges better and faster than genetics. Tim Waring and Zach Wood found that humans are experiencing a 'special evolutionary transition' in which the importance of culture is surpassing the value of genes as the primary driver of human evolution. Due to the group-orientated nature of culture, they also concluded...

Lighting hydrogels via nanomaterials

Hydrogels are commonly used inside the body to help in tissue regeneration and drug delivery. However, once inside, they can be challenging to control for optimal use. A team of researchers is developing a new way to manipulate the gel -- by using light.

Male piglets less resilient to stress when moms get sick during pregnancy

When pigs get hit with significant illnesses during key stages of pregnancy, their immune response may negatively affect developing piglets, making them less productive on the farm. New research from the University of Illinois shows that when those piglets—especially males—experience a second stressor in early life, they are at higher risk of neurodevelopmental and other neurological...

California urges EPA to let state set car-emissions standard

Officials from California, New York and other states urged the Environmental Protection Agency on Wednesday to allow California to set its own automobile tailpipe pollution standards, which would reverse a Trump administration policy and could help usher in stricter emissions standards for new passenger vehicles nationwide.

Machine learning platform mines nature for new drugs

Researchers have developed a new process using machine learning algorithms to match the signals of a microbe's metabolites with its genomic signals and identify which likely correspond to a natural product. Knowing that, researchers are better equipped to isolate the natural product to begin developing it for a possible drug and possibly reinvigorate the search for natural product drugs.

Scientist identifies signaling underlying regeneration

The mystery of why salamanders can regenerate a lost limb, but adult mammals cannot has fascinated observers for thousands of years. Now, a team of scientists has come a step closer to unraveling that mystery with the discovery of differences in molecular signaling that promote regeneration in the axolotl, a highly regenerative salamander, while blocking it in the adult mouse.

Dead zones formed repeatedly in North Pacific during warm climates

An analysis of sediment cores from the Bering Sea has revealed a recurring relationship between warmer climates and abrupt episodes of low-oxygen 'dead zones' in the subarctic North Pacific Ocean over the past 1.2 million years. The findings provide crucial information for understanding the causes of low oxygen or 'hypoxia' in the North Pacific and for predicting the occurrence of hypoxic...

New study may help explain low oxygen levels in COVID-19 patients

A new study sheds light on why many COVID-19 patients, even those not in hospital, are suffering from hypoxia -- a potentially dangerous condition in which there is decreased oxygenation in the body's tissues. The study also shows why the anti-inflammatory drug dexamethasone has been an effective treatment.

A new dimension in the quest to understand dark matter

As its name suggests, dark matter -- material which makes up about 85% of the mass in the universe -- emits no light, eluding easy detection. Its properties, too, remain fairly obscure. Now, a theoretical particle physicist have shown how theories positing the existence a new type of force could help explain dark matter's properties.

Shadow figment technology foils cyberattacks

Scientists have created a cybersecurity technology called Shadow Figment that is designed to lure hackers into an artificial world, then stop them from doing damage by feeding them illusory tidbits of success. The aim is to sequester bad actors by captivating them with an attractive -- but imaginary -- world. The technology is aimed at protecting physical targets -- infrastructure such as...

Spiders can sniff out and avoid killer ants

Spiders avoid building webs near European fire ants, their natural predators, by sensing the chemicals they give off in the environment, researchers have found. The findings give us a peek inside the enduring struggle between spiders and ants, and could lead to the development of natural repellents for homeowners worried about unwanted eight-legged guests.