Harnessing the sun’s energy during day for use at night

Solar energy has long been used as a clean alternative to fossil fuels such as coal and oil, but it could only be harnessed during the day when the sun’s rays were strongest. Now researchers led by Tom Meyer at the Energy Frontier Research Center at the University of North Carolina at Chapel Hill have built a system that converts the sun’s energy not into electricity but hydrogen fuel and stores it for later use, allowing us to power our devices long after the sun goes down.

Aftershock: Chilean quake shortened Earth days

A JPL research scientist has hypothesized that the recent magnitude 8.8 earthquake in Chile shortened the length of each Earth day by approximately 1.26 microseconds, or one millionth of a second.