In contrast, the new battery is a more direct reimagination of Edison’s idea, in that it focuses on the battery itself as ...

From 400 kilometers above, these storms eclipse ground-level drama. Each bolt, just a millisecond flash, unleashes 5 billion joules, superheating air to 30,000 Kelvin, five times the Sun's surface.

PHILADELPHIA (WPVI) -- Everyone knows it's cold it is outside. The entire Philadelphia region has remained below freezing for the seventh day in a row, with little relief in sight. But we are tapping ...