Virus variants threaten epidemic, scientists say

For weeks, the mood has been buoyant in many parts of the United States. Cases, hospital admissions and deaths from coronavirus have fallen far below their level, and millions of people are being vaccinated every day. Restaurants, shops and schools have reopened. Some states, such as Texas and Florida, have …

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How long will it take to orbit the moon?

From our point of view on Earth, the moon seems small. But if you’re hoping to get into a spaceship, don a spacesuit and go on an epic lunar hike, how long does it take to walk around? Answer You depend on a number of factors, including how fast you …

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