Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		Health & MedicineNew delta variant studies show the pandemic is far from over
The coronavirus’s delta variant is different from earlier strains of the virus in worrying ways, health officials are discovering.
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		AnthropologyA skeleton from Peru vies for the title of oldest known shark attack victim
The 6,000-year-old remains of a teen with a missing leg and tell-tale bite marks came to light after news of a 3,000-year-old victim in Japan surfaced.
By Bruce Bower - 			
			
		Health & MedicineWhy the CDC says it’s crucial to start wearing masks indoors again
While unvaccinated people are driving the spread of the coronavirus, vaccinated people infected with the delta variant may also easily transmit it.
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		Health & MedicineWhy it’s still so hard to find treatments for early COVID-19
Small studies, unexpected side effects and incomplete information about how drugs work can stymie clinical trials for drugs that can treat COVID-19.
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		Health & MedicineWhat experts know so far about COVID-19 boosters for immunocompromised people
Some immunocompromised people remain at risk for severe COVID-19 despite being vaccinated. Studies hint that an additional vaccine dose might help.
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		AnthropologyA partial skeleton reveals the world’s oldest known shark attack
An ancient shark bite victim died quickly, before his body was recovered and buried, a new study finds.
By Bruce Bower - 			
			
		Health & MedicineThe coronavirus cuts cells’ hairlike cilia, which may help it invade the lungs
Images show that the coronavirus clears the respiratory tract of hairlike structures called cilia, which keep foreign objects out of the lungs.
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		HumansOnly a tiny fraction of our DNA is uniquely human
Some of the exclusively human tweaks to DNA may have played a role in brain evolution.
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		Health & MedicineHuman cells make a soaplike substance that busts up bacteria
Nonimmune cells can fight off pathogens by releasing a detergent-like molecule that dissolves bacterial membranes.
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		Health & MedicineMillions of kids have missed routine vaccines thanks to COVID-19
Missed shots due to the pandemic may have cut vaccination rates for measles, diphtheria, tetanus and pertussis to their lowest levels in over a decade.
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		Humans‘The Joy of Sweat’ will help you make peace with perspiration
Dripping with science and history, a new book by science journalist Sarah Everts seeks to take the stigma off sweat.
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		Science & SocietyHow science overlooks Asian Americans
Existing scientific datasets fail to capture details on Asian Americans, making it hard to assess the group’s overall well-being.
By Sujata Gupta