Google has unveiled a cutting-edge modular smartphone. Will its Puerto Rican test run succeed?
Last February, a meteor exploded 28 miles above the city of Chelyabinsk, Russia, producing a devastating shockwave that knocked people off their feet and shattered windows throughout the city. Traveling at 12 miles per second, the 20-meter wide space rock exploded with the energy of around 500 kilotons. At its peak, the streaking fireball glowed… Read more »