Beyond plaques and tangles: Genetic variation may increase risk of cognitive decline

A genetic variation in some people may be associated with cognitive decline that can't be explained by deposits of two key proteins associated with Alzheimer's disease, amyloid β and tau, according to a study published in the September 16, 2020, online issue of Neurology, the medical journal of the American Academy of Neurology. The genetic variation leads to alterations in the metabolism of glutathione, an antioxidant, and may be associated with thinning of the cortex of the brain, the study says. The variation is found on the sixth chromosome.

Could monitoring blood pressure help reduce falls for people with Parkinson's?

People with Parkinson's disease are more likely than people of a similar age without the disease to have a sudden drop in blood pressure upon standing, a phenomenon called orthostatic hypotension, according to a new study published in the September 16, 2020, online issue of Neurology. The drop in blood pressure can lead to dizziness, lightheadedness, and even loss of consciousness and falls.

Doctors in hard-hit Madrid: 'It's like March in slow motion'

It feels like a flashback. Bilateral pneumonia, a common acute manifestation of the COVID-19 disease, is keeping Spanish intensive care wards busy again. And it's also leaving medical workers who are still recovering from the pandemic's peak with an anxious sense of déja vu.

Facebook plans Ray-Ban smart glasses as it eyes AR

Facebook on Wednesday announced it would launch its own smart glasses next year which connect to smartphones as part of an alliance with eyewear titan EssilorLuxottica.

Scientists explain how diverse species coexist in microbial communities

Diversity in many biological communities is a sign of an ecosystem in balance. When one species dominates, the entire system can go haywire. For example, the uncontrolled overgrowth of certain oceanic algae species causes toxic red tides that kill fish and other sea life, and sicken humans. On a more individual level, the human gut hosts a large community of different bacteria that is crucial for proper digestion and absorption of nutrients. Disruption of or imbalances in this bacterial community can cause a bloom in the growth of a toxic species, causing nausea, diarrhea and other illnesses. Plainly, there's an urgent need to understand how microbial community diversity is developed and maintained, especially as human activities change our external and internal environments.

NASA sees tropical storm Karina's night moves

Tropical Storm Karina was making night moves like the old Bob Seger song. NASA-NOAA's Suomi NPP satellite provided an infrared image of Tropical Storm Karina's nighttime movement as it moved away from the Baja California peninsula of Mexico. Infrared data showed the storm was weakening.

NASA imagery reveals Paulette became a strong extratropical cyclone

Tropical cyclones can become post-tropical before they dissipate, meaning they can become sub-tropical, extra-tropical or a remnant low-pressure area. As Hurricane Paulette transitioned into an extra-tropical storm, NASA's Terra satellite provided a visible image of the powerful storm, and the National Hurricane Center issued their final advisory on the system.

People's life goals relate to their personality type, study suggests

In the first research of its kind, a new University of California, Davis, study suggests that for the most part, people formulate goals consistent with their personality traits—and an individual's goals are related to how their personality subsequently changes over time.

Health risks of breathing in wildfire smoke

Breathing for residents across the west coast of the U.S. is becoming increasingly difficult as wildfires continue to spread across large portions of several states, according to news reports.

A protein in the pancreas protects it from stress induced by a high-fat diet

Every time we eat, the glucose level in our body goes up. This spurs our pancreatic machinery into action and through intricate physiological mechanisms, appropriate amounts of insulin are produced, our blood glucose levels are controlled, and we remain healthy. But when a person indulges in high-fat food repeatedly over the long term, their pancreas is consistently overstimulated, eventually contributing to its damage and impairing its function. This increases the risk of developing type 2 diabetes, in which glucose level control mechanisms become lopsided.

Turbulence affects aerosols and cloud formation

Chat with an atmospheric scientist for more than a few minutes, and it's likely they'll start advocating for a planetary name change. Planet Ocean-Cloud is much more fitting than Earth, they'll say, when so much of our planet's life systems are affected by the interactions of clouds and the oceans.

Amazon plans to put 1,000 warehouses in neighborhoods

Amazon.com Inc. plans to open 1,000 small delivery hubs in cities and suburbs all over the U.S., according to people familiar with the plans. The facilities, which will eventually number about 1,500, will bring products closer to customers, making shopping online about as fast as a quick run to the store. It will also help the world's largest e-commerce company take on a resurgent Walmart Inc.

Making sense of cholesterol: The good, the bad and the dietary

Cholesterol can be confusing. But understanding it could help you live a longer, healthier life.

Do ordinary eyeglasses offer protection against COVID-19?

(HealthDay)—Eyeglasses keep you from tripping over footstools and walking into walls, but they also might have a side benefit to spark envy among those with 20/20 vision.

NASA finds coldest cloud tops on hurricane Teddy's western side

NASA analyzed the cloud top temperatures in Hurricane Teddy using infrared light to determine the strength of the storm. Infrared imagery revealed that the strongest storms were on Teddy's western side.