Our existence on Earth is threatened by numerous asteroids that exist all around our planet. Most of them can’t be identified before they are on a collision course with Earth.
A technology designed to deflect a major asteroid does not exist. The need for such technology was emphasized when a meteor exploded above the Chelyabinsk, in Russia in October 2013. Hundreds were injured during this event.
The space agency is monitoring only a few potentially dangerous asteroids. Quite recently, a giant 640-meter asteroid flew past our planet and missed us by 300,000 miles.
Even an asteroid of one mile in length can cause immense damage to a continent or cause tsunamis across the sea.
The following video is a computer generated presentation of what would happen if an asteroid struck the Earth.