Lord Martin Rees, the UK’s Astronomer Royal, said robots are now so advanced there is no reason to risk lives on missions.

NASA's record-setting spacecraft was just 3.8 million miles from the sun's surface—the closest any human-made object has ever ...

Speaking on the 25th anniversary of his rule, President Vladimir V. Putin delivered an upbeat and vague New Year’s Eve message that did not address casualties in Ukraine or rising inflation at home.

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