There are over 38 known clusters of these meteor showers..that we know of today. Combined with NEO's and comet's, these are what cause me worry from time to time.
Small rocks are harmless, they burn in the atmosphere. Meteor showers are pretty, and cause zero damage.
Big rocks are rare, and unlikely to hit Earth.
Even if/when is happens, they might miss highly populated areas and not cause a lot of damage anyway.
Really big rocks are all discovered, counted etc. No worries here. None of them on the collision course.
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