An asteroid estimated to be a kilometer (3,451 feet) wide will fly by Earth on January 18. The video in the media player above is from a related report. It will pass within 1.2 million miles of our ...

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The asteroid, known as 2022 RD2, belongs to a rare class of space rocks called Arjunas. These objects travel around the sun ...

Earth’s fever persisted last year, not quite spiking to a record high but still in the top five or six warmest on record, government agencies reported Thursday. But expect record-shattering hot years ...