A giant asteroid the size of a car showed up on the University of Hawaii’s survey telescopes mere hours before it entered the Earth’s atmosphere about 240 miles south of San Juan, Puerto Rico. At the time of first observation, the asteroid was just farther out than our Moon – at about 500,000 km from Earth (the Moon sits […]
Earth’s magnetic North Pole has drifted so fast that authorities have had to officially redefine the location of the magnetic North Pole. The extreme wandering of the North Pole caused increasing concerns over navigation, especially in high latitudes. Earth’s magnetic field is known to have wandered and flipped in the geologic past. Earth’s magnetic field […]