Science

In a major revision of guidelines aimed at encouraging more schools to welcome children back into face-to-face classes, federal health officials on Friday relaxed the 6-foot distancing rule for elementary school students, saying they were…

The medical group and another advocacy group, Human Rights Watch, exposed the threats to public health, especially children, from anti-personnel landmines in Cambodia. In a report she called for an international ban on these weapons. The…

Update, March 18: This essay has been revised to reflect that the Space Launch System has completed its second hot fire test.Eleven years in the making, NASA's most powerful rocket since the Apollo program has finally stood upright. Framed…

On Thursday, NASA's new large rocket, the Space Launch System, will make a second attempt to get nowhere.This test, known as hot fire, is a critical step for the rocket, which has been in development for more than a decade. The four motors…

WASHINGTON - One of the federal government's major efforts to urge Americans to prepare for climate threats is in doubt after the Senate majority leader's office objected to a plan to adjust flood insurance rates.The Federal Emergency…

Yvette Lowery usually gets her annual mammogram in March. But last year when the pandemic took hold and medical facilities closed, the center she goes to canceled her appointment. Nobody could tell her when to set a new appointment."They…

Pamela Addison is, in her own words, "one of the shyest people in the world". Certainly not the kind of person to file a comment on a newspaper, set up a stranger support group, or ask a United States senator to vote for $ 1.9 trillion.No…

Russell Impagliazzo, a professor of computer science at the University of California at San Diego, said the LLL algorithm also resulted in something called homomorphic encryption, which allows calculations to be performed on encrypted data…

A Bedouin shepherd came across the first of the ancient scrolls in 1947. He found them in jars in a cave in Qumran near the northern tip of the Dead Sea. Some were sold to a monastery, others to an antique dealer in Bethlehem. Once their…

The pharmaceutical company Moderna has started a study testing its Covid vaccine in children under the age of 12, including babies as young as six months, the company said Tuesday.The study is expected to enroll 6,750 healthy children in…