Fascinating stuff "Archaeologists cannot give any rational explanations on how this was possible." ... "Several people tried to discover the secret of this sto

Fascinating stuff "Archaeologists cannot give any rational explanations on how this was possible." ... "Several people tried to discover the secret of this stone making. They were successful in softening the limestone that they reduced to a soft mass. But they failed to harden it again. This has been the reason, why, 40 years ago, Davidovits and Aliaga stopped their studies. They could disaggregate (limestone) but they were not capable to re-agglomerate it, to harden it again. The appropriate knowledge was acquired very recently (2 years ago)"