Category: Biology

Antibody-producing yeast vanquishes deadly gut infection in mice

A type of yeast has been engineered to battle the bacterium Clostridioides difficile (above). Kari Lounatmaa/Science Source By Jocelyn KaiserOct. 28, 2020 , 2:00 PM When people take antibiotics for one infection, another can swoop in to take its place: the bacterium Clostridioides difficile, which causes severe, recurring colon infections that kill nearly 30,000 people …

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‘Landmark’ study resolves a major mystery of how genes govern human height

A person’s height is strongly influenced by their DNA and scientists are closing in on the gene variants that affect this trait. Antonio_Diaz/iStock By Jocelyn KaiserNov. 3, 2020 , 5:00 PM For height, DNA is largely destiny. Studies of identical and fraternal twins suggest up to 80% of variation in height is genetic. But the …

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Microbes’ mystery DNA helps defeat viruses—and has genome-editing potential

Phage viruses land on a bacterium to insert their genes, but it may be able to fight back with odd genetic weapons called retrons. Eye of Science/Science Source By Elizabeth PennisiNov. 11, 2020 , 4:45 PM Seven years ago, an understanding of nature inspired a revolutionary new technology, when researchers turned a defense system used …

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Heat is killing more people than ever. Scientists are looking for ways to lower the risk

Sweat plays an important role in cooling the body, so researchers are capturing and measuring it. PAUL JONES/UNIVERSITY OF WOLLONGONG By Elizabeth PennisiNov. 12, 2020 , 2:00 PM It’s 5 a.m. and still dark at the Carlton Complex fire camp in central Washington, except for the fire’s orange glow on a distant ridgeline. Wildlands firefighter …

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Giant virus genomes discovered lurking in DNA of common algae

Green algae (pictured) can sometimes host the DNA of entire giant viruses in their genomes. Ami Images/Science Source By Elizabeth PennisiNov. 18, 2020 , 11:00 AM In 2003, scientists discovered something huge, literally, in the virus world: viruses so big they could be seen with a standard microscope. These massive parasites were considered rare at …

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