Can an Asteroid, a Comet or a Meteoroid collide with Earth? (E)

EARTH is a special planet, a home to millions of living creatures. However, it is just a tiny object among billion others in our universe. Some remain far from our planet while some cross our path quite closely What if any of these collide with the Earth someday? Will all the lives on earth vanish? Or will we be able to protect ourselves?

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