The Earth is really, really old. Over 4 1/2 billion years old, in fact. How do we begin to comprehend a number that large? It helps to put it on a more fathomable scale. Watch to see where Earth's ...

On the left side of the animation, numbers indicate the speeds of Earth's rotation, its orbit around the sun, the solar system's orbit around the Milky Way's center, and the galaxy hurtling ...

NASA animation shows geomagnetic intensity and 'South Atlantic Anomaly' on the surface of the earth from 2015 through 2025. US: Geologists Monitor Eruption at Halema‘uma‘u Crater The Richest ...