We like to think of our home as a nice, smooth sphere. But mapping the Earth’s gravitational field provides a different view ...

For centuries, Earth has been pictured as a near-perfect blue sphere floating through space — but a new high-precision gravity model is revealing a far stranger reality. Using detailed measurements ...

NASA's GRACE satellites mapped subtle variations in Earth's gravity field. These gravity anomalies originate from dense and ...

Earth takes 24 hours to complete a full rotation in a standard day, equal to exactly 86,400 seconds. July 9 was the first of three days in which a millisecond or more could be shaved off the clock on ...

On those three days, just over a millisecond is expected to be shaved off the standard 24-hour day. Of course, you're unlikely to notice such a miniscule difference in your day. But scientists who ...

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Earth spun just a bit faster than usual on July 9 and is expected to do so again on July 22 and Aug. 5, according to the website TimeAndDate. Over a millisecond was reportedly shaved off the clock on ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known ...