Antler Picks that built Ancient Monuments: - yet there is no real evidence of this achievement (13 Ancient things that don't make sense in History)

According to the history books, our ancestors built the great and numerous prehistoric sites using basic tools such as antler picks to cut the chalk bedrock and animal shoulder blades as a shovel.

Some of these ancient constructions moved over half a million tonnes of chalk to create the likes of Silbury Hill - the largest prehistoric mound in Europe and Avebury with its massive 70 foot wide and 36 foot deep ditches that took eighteen million man-hours to build over very many years.

Yet in Avebury only one buried antler has ever been found and less than a handful of tiny fragments found inside Silbury Hill.

So how were these monuments really built and why has this false evidence made its way into our history books?