By Ben Meiselas

ALT: wayne 's world is giving a thumbs up and smiling .

Australia's extensive solar power penetration makes so much energy that the government wants to offer free electricity at peak hours.

This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system for another 1,000 years.

Oklahoma will require applicants for teacher jobs coming from California and New York to pass an exam the GOP-dominated state's top education official says is designed to safeguard against "radical le...