Experiment recreation (IMAGE) California Institute of Technology Caption Engineers at Caltech recreated the experiment depicted in Leonardo da Vinci's journal, showing that if the motion of a pitcher pouring out water or granular material is accelerated at the same rate that gravity accelerates the falling material, it creates an equilateral triangle. Credit Caltech Usage Restrictions For use in news stories only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.