when will earth be destroyed

Potentially hazardous asteroid might come closest to Earth soon. The National Aeronautics and Space Administration (NASA) has alerted that an asteroid that is four times as big as the Empire State Building is speeding towards Earth.  According to a report published in LiveScience, NASA has classified the asteroid as "potentially hazardous". The asteroid is hurling through space at a speed of 47,200 mph (76,000 km/h), which is 20 times faster than a bullet. This…