Will Earth ever get hit by an asteroid

SCIENTISTS SAY ITS POSSIBLE IN THE FUTURE THAT THE EARTH MIGHT GET HIT BY A ASTEROID AND IF THE EARTH IS HIT BY AN ASTEROID EARTH WILL BE GONE THERE WILL BE NO LIFE ON EARTH AND HOW DO I KNOW THIS IS BECAUSE SCIENTISTS HAVE BEEN WATCHING THE ASTEROID BELT AND THE MOVEMENT OF THE ASTEROIDS AND HOW THEY CAN BREAK LOOSE AND HIT EARTH THATS HOW I THINK EARTH WILL END .