Science

Her study found the glymphatic clearance was mediated by a hormone called norepinephrine and happened almost exclusively during the NREM sleep phase. But it only worked when sleep was natural. Anesthesia and sleeping pills shut this process down nearly completely.

Consider using FreeTube, an open-source program for YouTube, because your privacy is important.

From the article:

Risky play is associated with greater resilience, self-confidence, problem-solving and social skills such as cooperation, negotiation and empathy, according to studies by Sandseter and others. When a study in Leuven, Belgium, gave four- and six-year-olds just two hours a week of opportunities for risky play over the course of three months, their risk-assessment skills improved compared with those of children in a control group2. In this study, the risky play took place at school, in a gym class and in the classroom.

In this video I will assume that space is a non-linear elastic medium to investigate if it is possible to confine wave energy locally.

Light is Heavy by M.B. van der Mark, G.W. 't Hooft: https://arxiv.org/abs/1508.06478

The Schwinger limit: https://en.wikipedia.org/wiki/Schwinger_limit

Abstract

The disparity in environmental impacts across different countries has been widely acknowledged1,2. However, ascertaining the specific responsibility within the complex interactions of economies and consumption groups remains a challenging endeavour3,4,5. Here, using an expenditure database that includes up to 201 consumption groups across 168 countries, we investigate the distribution of 6 environmental footprint indicators and assess the impact of specific consumption expenditures on planetary boundary transgressions. We show that 31–67% and 51–91% of the planetary boundary breaching responsibility could be attributed to the global top 10% and top 20% of consumers, respectively, from both developed and developing countries. By following an effective mitigation pathway, the global top 20% of consumers could adopt the consumption levels and patterns that have the lowest environmental impacts within their quintile, yielding a reduction of 25–53% in environmental pressure. In this scenario, actions focused solely on the food and services sectors would reduce environmental pressure enough to bring land-system change and biosphere integrity back within their respective planetary boundaries. Our study highlights the critical need to focus on high-expenditure consumers for effectively addressing planetary boundary transgressions.

From the paper - definition of the top global consumers:

The global 10th percentile level of final demand is about US$27,000 per year, equivalent to the European average in 2017. The global 20th percentile level is about US$12,000 per year, comparable to the threshold of high-income countries defined by the United Nations in 2017.

A UAB research has characterised in detail how polymer-based commercial tea bags release millions of nanoplastics and microplastics when infused. The study shows for the first time the capacity of these particles to be absorbed by human intestinal cells, and are thus able to reach the bloodstream and spread throughout the body.

Researchers found viruses infect bacteria and other microorganisms in acid mine drainage and may control microbial diversity in these extreme environments.