Da Vinci understood key aspect of gravity centuries before Einstein, lost sketches reveal

A Doodle Reveals da Vinci’s Early Deconstruction of Gravity: Long before Galileo and Newton used superior mathematics to study a fundamental natural force, Leonardo calculated the gravitational constant with surprising accuracy

Leonardo da Vinci’s Forgotten Gravity Experiments Show He Was Centuries Ahead of His Time

Leonardo da Vinci's lost sketches show early experiments to understand gravity