How might we cope with shorter days and less sleep? How would it affect our climate and geography? Can we survive any faster?

Add Yahoo as a preferred source to see more of our stories on Google. The equator is the imaginary line that horizontally encircles the middle of Earth, stretching approximately 24,900 miles (40,000 ...

Earth's shape can be tested in surprisingly simple ways without relying on space photographs. The strongest part of the ...

IntroductionImagine you are sitting in a chair in a quiet room. The desk, the floor, and the air all appear to be still.

This illustration by Tau’olunga via Wikimedia Commons shows the day arc of the equinox sun, as seen from Earth’s equator. Also showing are twilight suns (in red) down to -18° altitude. Note the sun at ...

The Earth is round, and we know this from detailed measurements and geometric inferencing based off satellites with lasers. Earth is often described as a circle or an oval, but it is neither. As the ...

The first thing to keep in mind is that ocean currents are very thin compared to the 12,742-kilometer (7,917-mile) diameter of Earth. They’re only about four kilometers (13,000 feet) deep at most, and ...