164 articles from WEDNESDAY 22.9.2021

How a city’s design creates congestion

City planners predict that as more people move into urban areas, traffic jams will get worse. That's why sustainability experts propose a new way to analyze traffic congestion. Using more precise measures to describe the shape of cities and considering other socioeconomic factors, the model, which was applied to nearly 100 American cities, could lead to a better understanding of the link between...

NASA finds 2021 Arctic summer sea ice 12th-lowest on record

Sea ice in the Arctic appears to have hit its annual minimum extent on Sept. 16, after waning in the 2021 Northern Hemisphere spring and summer. The summertime extent is the 12th-lowest in the satellite record, according to scientists at the NASA-supported National Snow and Ice Data Center and NASA.

How do migraines affect the sleep cycle?

Adults and children with migraines may get less quality, REM sleep time than people who don't have migraines. That's according to a meta-analysis. Children with migraines were also found to get less total sleep time than their healthy peers but took less time to fall asleep.

Seeking climate-smart strategies for root, tuber and banana crops in central Africa

Root, tuber and banana (RT&B) crops are widely cultivated across the landscapes of sub-Saharan Africa (SSA). These staple food crops play a fundamental role in smallholder farming systems due to their good economic value and high importance within the daily diets of most households. The extensive planting of RT&B crops highlights their adaptive nature, but a team of researchers has identified a...

Metals supercharge a promising method to bury harmful carbon dioxide under the sea

There's a global race to reduce the amount of harmful gases in our atmosphere to slow down the pace of climate change, and one way to do that is through carbon capture and sequestration—sucking carbon out of the air and burying it. At this point, however, we're capturing only a fraction of the carbon needed to make any kind of dent in climate change.

Study explores the role of landlords in housing discrimination

Examining the practices landlords use to screen potential tenants can offer significant insights into how racism continues to shape life outcomes. While sociological research on racial discrimination in housing has increasingly highlighted the key role that landlords play as gatekeepers to rental housing markets, this research has largely been operating under the fundamental assumption that...

A history of colorism sheds light on discrimination today

Colorism is a form of discrimination, typically within a racial or ethnic group, favoring people with lighter skin over those with darker skin. This pernicious form of discrimination is often overshadowed in discussions about racism, but it affects a broad swath of people across multiple populations.

Some animal species can survive successfully without sexual reproduction

In the framework of an international research project, a team of scientists have demonstrated for the first time that asexual reproduction can be successful in the long term. The animal they studied is the beetle mite Oppiella nova. Until now, the survival of an animal species over a geologically long period of time without sexual reproduction was considered very unlikely, if not impossible.

Early Homo sapiens groups in Europe faced subarctic climates

Using oxygen stable isotope analysis of tooth enamel from animals butchered by humans at the site of Bacho Kiro Cave, Bulgaria, researchers show that human groups belonging to an early wave of dispersal of our species into Europe were faced with very cold climatic conditions while they occupied the cave between about 46,000 and 43,000 years ago. Archaeological remains at Bacho Kiro Cave currently...

Continental growth is not a continuous process

The continents, a specific feature of our planet, still hold many secrets. Using chemical data on sedimentary rocks compiled from the scientific literature from the 1980s to the present day, researchers have uncovered a new geological history of the continents. The research shows that their growth was not a continuous process, and that they have always been rich in silica1. This new study calls...

What Would a Climate-Conscious Facebook Look Like?

A version of this story first appeared in the Climate is Everything newsletter. If you’d like sign up to receive this free once-a-week email, click here. After a summer of devastating hurricanes, heat waves and wildfires, Facebook’s new measures to address climate misinformation leave something to be desired. In fact, you might be forgiven for thinking they were a joke. In a blog...