The announcement came as nearly 10,000 cases have been reported worldwide.
The United States set its advisory at Level 4, which represents the highest safety risk. The World Health Organization said the virus represents a risk outside of China.
The unlikely fossil sheds new light on the flying reptile’s dining habits.
NASA’s Spitzer space telescope spotted 7 Earth-size worlds orbiting another star, a new ring around Saturn and many more wonders in space.
A proposed regulation would codify a legal opinion in 2017 that declared the accidental killing of birds during the course of business as no longer subject to punishment.
A new telescope in Hawaii takes aim at our nearest star and its mysteries.
The babies, who ranged in age from a day to a month old, started experiencing respiratory difficulties about the same time, leading a hospital to investigate.
The time to prevent more epidemics is now, and countries are trying to seize the moment.
Stores are selling out of masks, and health care workers risk infection if they cannot get the protective gear.
Is a scientist in politics incongruous? Cédric Villani, Fields Medal winner and mayoral candidate, doesn’t think so.
Chinese officials have confirmed over 7,700 cases of the mysterious illness as foreign governments airlifted their citizens out of Wuhan, the outbreak’s epicenter.
The number of known cases of the new virus rose by nearly a third overnight. A shortage of test kits has led experts to warn that the real number may be higher.
Researchers in Antarctica found unusually warm water beneath a massive glacier that is already melting and contributing to sea level rise.
Researchers outfitted 169 seabirds with radar detectors to pinpoint vessels that had turned off their transponders.
Dozens of footprints left by dinosaurs and other creatures were left in what is now South Africa before the Gondwana supercontinent broke up.
New technology and better coordination have sped up development. But a coronavirus vaccine is still months — and most likely years — away.
Prosecutors say Charles M. Lieber, the chair of Harvard’s chemistry department, lied about contacts with a Chinese state-run initiative that seeks to draw foreign-educated talent.
Federal health officials are monitoring 63 other people in 22 states for signs of infection.
The agency is allowing cities to delay or otherwise change federally imposed fixes to their sewer systems.
The Food and Drug Administration told the maker of Purell hand sanitizers to discontinue marketing campaigns that the agency complained also included claims for avoiding illness from other viruses.
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