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3 em 1: Pandemia tem origens em Wuhan; pandemia e aposentadorias na academia; Café e mudanças no cérebro
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Pandemic origin traced to Wuhan market
Three studies, one of which has not yet been peer-reviewed, reveal intriguing clues about how the COVID-19 pandemic started. Two of the reports trace the outbreak to a huge market that sold live animals in Wuhan, China. A third indicates that SARS-CoV-2 spilled over from animals — possibly those sold at the market — into humans at least twice in November or December 2019. Last May, virologist Michael Worobey, an author on two of the papers, led a letter published in Science in which he and other researchers pressed the scientific community to keep an open mind about whether the pandemic stemmed from a laboratory leak. Now, converging evidence strengthens the idea that the pandemic’s origins lie in wild animals sold as products, he says. “When you look at all of the evidence, it is clear that this started at the market,” says Worobey.
When Nature published this story in February, two of the studies were preprints; now they have been peer-reviewed, and they were published in Science last week.
The great resignation has hit academia
A wave of researchers is joining the ‘great resignation’ and quitting academia for good. Many scientists were already unhappy with long hours, crushing workloads, poor salaries and limited job prospects, and now they say the pandemic has sparked a re-evaluation of their careers and lifestyles. Some are announcing their exit to the world with the #leavingacademia hashtag. “COVID-19 is the straw that broke the camels’ backs,” says career coach Karen Kelsky.
How coffee might change your brain
Research in mice suggests that caffeine creates long-lasting changes in the brain. Animals who drank caffeine-infused water for two weeks had changes in gene-activity patterns in many types of brain cell, leading to an overall decrease in the synthesis of proteins involved in metabolism and an increase in those involved in neuronal signalling and plasticity. After a learning task, the caffeinated mice exhibited a larger boost in the activity of genes involved in processes such as memory formation than did mice that hadn’t consumed caffeine. (From May)
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