The book I read to research this post was East of Eden by Graham Phillips which is an excellent book which I bought from kindle. In 1486BC a comet passed very close to the earth & it looks likely a fragment broke up in the earths atmosphere which according to chinese astrologers of the time had 10 tails & was approximately 20 times the size of a full moon. I’m only going to look at the impact on the megalithic people of britain but this book looks at the impact worldwide & many cultures thought it was a bad omen & it changed civilisation. Most comets are found in the oort belt but quite a few have broken out of that orbit & some like halleys comet visit the earth periodically. It’s worth noting a religious cult in the USA committed mass suicide in 1997 after a visit by a particularly close comet.
Megalithic man built many structures among them silbury hill which was not a burial site as was once thought. Stonehenges construction remains something of a mystery. Why was it necessary to mine the stone in wales when surely there was suitable stone nearby? Most of these huge structures took around 15 years to complete which is amazing when you consider they didn’t have pack animals & the people lived in tiny communities so had to travel to work. Over 50% of the population were involved in megalithic construction projects & in the case of newgrange a burial mound in Ireland it was built a thousand years before the pyramids. The egyptians at least had pack animals, large amounts of labour & the wheel had been invented by then. Stonehenge might seem big to us nowadays but avebury was a stone circle 3/4 mile in diameter although much of that was taken away for building purposes & most of it is now gone. The megalithics had a very advanced culture until around 1500BC when the different tribes started feuding. It’s worth noting the megaliths were quite a peaceful bunch but they were wiped out in a period of a few years. This book argues it was the comet which caused this & it’s worth noting other races like the assyrians took it as a bad omen & started wars as well.