When was the world's tallest waterfall first measured as Angel Falls?

Angel Falls was brought to global attention after 1933, and later measurements established its full drop at about 979 metres, making it the world’s tallest waterfall. The site was named for pilot Jimmie Angel, who flew over the area and helped publicize it. The falls descend from the Auyán-tepui plateau in Venezuela, one of the country’s iconic table mountains. Because the water often turns to mist before reaching the bottom, the falls seem almost unreal from a distance.