Artificial light makes the modern world possible. But not all kinds of light are good for us. Electric light has fundamentally altered our lives, our bodies and the very nature of our sleep.
After several months of analysis of Comet 67P/Churyumov-Gerasimenko, the European Space Agency's Rosetta spacecraft has yielded some intriguing, and maybe, unexpected results. The data is refueling a long-running debate in the scientific community about a matter closer to home: the origin of Earth's oceans.
On July 19, NASA's Cassini probe captured a picture of the Earth and Moon, offering us a perspective of all of humanity on one tiny dot in space, and a reminder that Cassini is still out there exploring the distant reaches of the Solar System.
When researchers applied the same amount of pressure to iron that they think it’s under at the center of the earth — about three million times as much pressure as at sea level — it was surprisingly soft.