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Former President Donald J. Trump, whose administration sued Google over allegations it violated antitrust law, indicated that he might not break up the company if he regained the presidency, describing it as a bulwark against China’s technology ambitions. “China is afraid of Google,” Mr. Trump said while speaking on Tuesday …

Astronomers have identified thousands of planets orbiting distant stars using sophisticated observatories. But there’s something they have yet to spot with any certainty: moons around those worlds. Now a recent discovery around a Saturn-size planet 635 light-years from Earth offers one of the best potential clues that exomoons orbit exoplanets …

Around one in four adults in Britain is obese, according to estimates from the country’s National Health Service, and the problem costs the public health care system billions every year. Now, the government says that weight-loss injections might be part of the solution, and might even help boost Britain’s productivity, …