A mysterious die-off of endangered antelopes last spring in Central Asia was even more extensive than originally thought, killing more than half of the entire species in less than a month, scientists have found.

“I’ve worked in wildlife disease all my life, and I thought I’d seen some pretty grim things,” Richard A. Kock, of the Royal Veterinary College in London, said in a telephone interview. “But this takes the biscuit.”

At a scientific meeting last week in Tashkent, Uzbekistan, Dr. Kock and his colleagues reported that they had narrowed down the possible culprits. 

Continue reading “More Than Half of Entire Species of Saigas Gone in Mysterious Die-Off” →

Scores of leading scientists on Wednesday urged the creation of a major initiative to better understand the microbial communities critical to both human health and every ecosystem.

In two papers published simultaneously in the journals Science and Nature, the scientists called for a government-led effort akin to the Brain Initiative, a monumental multiyear project intended to develop new technologies to understand the human brain.

“This is the beginning of the shot to the moon,” said Jeffery F. Miller, the director of the California NanoSystems Institute at the University of California, Los Angeles, and a co-author of the Science paper. “There is so much to learn, and so many benefits of learning it.”

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Researchers have long wondered how people settled the Americas, particularly the path they took to the new territory and the timing of their expansion. Until recently, archaeologists studying these questions were limited mostly to digging up skeletons and artifacts.

But now scientists have begun extracting DNA from human bones, and the findings are providing new glimpses at the history of the first Americans. On Monday, researchers at the University of Alaska and elsewhere published an important addition to the growing genetic archive.

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