Why would we not see 100 to 300 “recent” craters from these speckling the surface - if they really were as frequent as this article implies?
Oh I absolutely grant those: The most recent being 50,000 years ago though.
But, if these car-sized collisions are causing the sonic booms (the atmospheric vibrations talked about in the article above) as frequently as indicated, where are the “house” and “apartment building” collisions that would cause craters over the last 49,000 years?
Would erosion, glciers, water impact “splashes”, and Arctic-Antarctic impacts being that that many medium-sized holes?
Hiroshima and Nagasaki blasts destroyed those cities with 12 kiloton nuclear airbursts. But a Hiroshima-sized nuclear wepon at 5000 feet made no discernible crater in the ground - it was still basically flat just 1 year later - what sized meteoroid can flatten a city (or cause equal damage) but leave no trace in the geological record?
A nuclear blast causes tremendous secondary EMP damage over large areas - Does a comet/asteroid impact cause EMP from its plasma release, even