November 4, 2021
Mohenjo
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All over the world, countries are confronting population stagnation and a fertility bust, a dizzying reversal unmatched in recorded history that will make first-birthday parties a rarer sight than funerals, and empty homes a common eyesore.
Maternity wards are already shutting down in Italy. Ghost cities are appearing in northeastern China. Universities in South Korea can’t find enough students, and in Germany, hundreds of thousands of properties have been razed, with the land turned into parks.
Like an avalanche, the demographic forces — pushing toward more deaths than births — seem to be expanding and accelerating. Though some countries continue to see their populations grow, especially in Africa, fertility rates are falling nearly everywhere else. Demographers now predict that by the latter half of the century or possibly earlier, the global population will enter a sustained decline for the first time.
A planet with fewer people could ease pressure on resources, slow the destructive impact of climate change and reduce household burdens for women. But the census announcements this month from China and the United States, which showed the slowest rates of population growth in decades for both countries, also point to hard-to-fathom adjustments.
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A family eating hotpot at a restaurant in Beijing. China’s population is projected to contract sharply this century.Credit…Gilles Sabrié for The New York Times
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November 4, 2021
Mohenjo
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November 3, 2021
Mohenjo
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For ancient mammalian megafauna—from brown bears to bison and more—death was something of a boy’s club. At least that’s what you might conclude from the vaults of natural history museums around the world, where the majority of fossilized mammal specimens come from males.
This has less to do with misogyny than with prehistoric herd distributions, sex-specific causes of death, and a slew of other factors that influenced where and how large mammals tended to die, according to a study published September 3 in Proceedings of the National Academy of Sciences.
Researchers from the University of Adelaide in Australia first identified this strange trend after analyzing ancient DNA in specimens in their own collection, according to Graham Gower, a genomic programmer and a coauthor of the study. There are a few ways to sex an ancient bone. If you’re lucky enough to have a whole bone, such as a skull, the size, shape, and dimensions might differ between male and female. In the case of fragments, researchers might have to dig into DNA for the number of X-chromosome sequences, Gower says. But usable DNA is scarce in most specimens that old. From approximately 20,000 samples, Gower says, the researchers got usable DNA from 5 percent.
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Woolly mammoths in a mural at the American Museum of Natural History in New York. Source: Charles R. Knight / Public Domain.
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November 3, 2021
Mohenjo
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Shane Campbell-Staton never planned on traveling to Mozambique in search of tuskless elephants, but weird things can happen when you stay up ’til 3 a.m. binge-watching YouTube videos. (“Sometimes, a brother can’t get to sleep, Ed,” he told me.)
Battling insomnia, Campbell-Staton watched a video about Gorongosa National Park. The park was once Edenic, but during Mozambique’s civil war, from 1977 to 1992, much of its wildlife was exterminated. Government troops and resistance fighters slaughtered 90 percent of Gorongosa’s elephants, selling their ivory to buy arms and supplies. Naturally, tuskless females, which are normally rare, were more likely to survive the culls; after the war, their unusual trait was noticeably common.
Campbell-Staton, a biologist at Princeton who studies rapid evolution, had questions. Was this a dramatic example of natural selection in action? Why only the females? Which genes were involved? He idly emailed his questions to a colleague who studies elephants, inadvertently setting off a chain of emails that recast his casual curiosity as serious intent, and soon found himself being introduced to a large group of Gorongosa researchers as “a guy who wants to study the genetic basis of tusklessness in elephants,” he told me. In response to which he thought: Wait a minute, I didn’t say that! I didn’t mean for this to be a whole thing. He had only ever worked with small anole lizards, but even so, when one of those researchers invited him to Gorongosa, he said yes.
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Jacques Le Roux / iStock / Getty
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November 3, 2021
Mohenjo
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November 2, 2021
Mohenjo
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While it can sometimes seem like humanity is hell-bent on environmental destruction, it’s unlikely our actions will end all life on Earth. Some creatures are sure to endure in this age of mass extinction and climate crisis. Over time, they will adapt to a harsher world we’ve helped create, evolving to meet the moment as best they can.
Some of these transformations have gotten underway in our lifetimes. Climate change, some research suggests, is already “shape-shifting” animals — shrinking certain migratory birds and speeding up the life cycles of amphibians, for example. No one knows exactly what changes to plants and animals will transpire in the years to come. Still, evolutionary biologists say it’s worth trying to imagine what creatures will evolve in the future.
“I do think it’s a really useful and important exercise,” Liz Alter, professor of evolutionary biology at California State University Monterey Bay, says on the latest episode of Unexplainable, Vox’s podcast about unanswered questions in science. In thinking about the animals of the future, Alter says, we must consider how we’re changing the environment now. “It’s a very sobering thing to think about the long future,” she says.
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November 2, 2021
Mohenjo
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November 2, 2021
Mohenjo
Business, Crime, Food For Thought, Human Interest, Medical, missed News, Political, Science, Technical
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November 1, 2021
Mohenjo
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Ivermectin is an antiparasitic drug and a very good one. If you are infected with the roundworms that cause river blindness or the parasitic mites that cause scabies, it is wonderfully effective. It is cheap; it is accessible, and its discoverers won the Nobel Prize in 2015. It has also been widely promoted as a coronavirus prophylactic and treatment.
This promotion has been broadly criticized as a fever dream conceived in the memetic bowels of the internet and as a convenient buttress for bad arguments against vaccination. This is not entirely fair. Perhaps 70 to 100 studies have been conducted on the use of ivermectin for treating or preventing COVID-19; several dozen of them support the hypothesis that the drug is a plague mitigant. Two meta-analyses, which looked at data aggregated across subsets of these studies, concluded that the drug has value in the fight against the pandemic.
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The Atlantic
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November 1, 2021
Mohenjo
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In today’s topsy-turvy job market, a strange new thing is happening. Employers are increasingly grumbling about job seekers “ghosting” them. These job candidates just don’t show up for their scheduled interviews. And in some cases, new hires accept a job only to disappear.
Here’s some of what I’ve heard from managers:
I’m in the medical field and this is happening to us to for the past year 6–12 months. Being ghosted for interviews, people not responding. Five people scheduled to interview, but one shows up. We’ve even hired people who didn’t show up in the first day or didn’t return for the second. Nurses and front office positions. It’s unreal.
I went from working at a nonprofit to working for a vendor. … Part of my job is hiring, but I’m having a much harder time hiring now than I did at the nonprofit. The pay and benefits are better—we start people at more than the max rate at the nonprofit, hours are more consistent, and we offer good PTO, matching 401k, and insurance. I’ve sent out over 30 offers to interview. Nine agreed to interviews. Three didn’t show up, two failed background checks, two didn’t want to travel … and we’ve made offers to the other two but neither has responded to accept or reject. I’ve never had so many people just not respond or not show up. Is this the new normal? … I’m at a loss and feeling really discouraged.
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Photo illustration by Slate. Photos by Thinkstock and leolintang/iStock/Getty Images Plus.
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