Researchers have discovered the hidden laboratory used by Leonardo Da Vinci for studies of flight and other pioneering scientific work in previously sealed rooms at a monastery next to the Basilica of the Santissima Annunziata, in the heart of Florence. The workshop rooms, located between the Institute for Military Geography and the Basilica, include frescos on walls painted by Da Vinci that have "impressive resemblances" to other examples of his experimental work, including a tryptich of birds circling above a subsequently erased representation of the Virgin Mary that "constitutes a clear citation of the studies by the Maestro on the flight of birds", according to the three researchers, Alessandro Del Meglio, Roberto Manneschalchi and Maria Carchio. - Read the article at the IOL site.