Every year on June 30, humans World Asteroid Day raises awareness about those ancient space rocks, hurtling through our solar system. The date was chosen because on June 30, 1908, the Tunguska event – when an asteroid is believed to have exploded in Siberia, Russia, leveling more than 2,150 sq km of forest. #WorldAsteroidDay #AsteroidDay #SpaceScience #Astronomy #PlanetaryDefense #NASA #ESA #SpaceExploration #LookUp #ScienceMatters