RT @RonBaalke: On this day in 1908, a comet/asteroid exploded over #Tunguska, Russia, knocking down 80 million trees. #AsteroidDay https://t.co/2SnI9xpEZz
RT @RonBaalke: On this day in 1908, a comet/asteroid exploded over #Tunguska, Russia, knocking down 80 million trees. #AsteroidDay https://t.co/2SnI9xpEZz