Asteroid DANGER: When will a ‘CITY-BUSTER’ asteroid slam into Earth?

Some of the larger asteroids are big enough to level cities and according to physicist Michio Kaku, they strike Earth quite frequently.

Dr Kaku, a theoretical physicist at City College of New York, warned “city-busters” hit the Earth on average every 100 years.

The last city-busting asteroid, the so-called Chelyabinsk Meteor, exploded over Chelyabinsk Oblast in Russia in 2013.

The 65.6ft-wide (20m) space rock entered the atmosphere undetected and from the direction of the Sun before it exploded with 30 times the power of the Hiroshima nuclear bomb.

The Chelyabinsk meteor damaged more than 7,000 buildings, causing shards of broken glass to injure more than 1,000 people.

READ MORE: NASA warns giant 11,700mph asteroid will hurtle past Earth