"Where the senses fail us, reason must step in..."
Dialogues Concerning Two New Sciences
Italian astronomer, physicist, engineer, and polymath Galileo Galilei died #OTD in 1642.
Galileo studied speed and velocity, gravity and free fall, the principle of relativity, inertia, projectile motion and also worked in applied science and technology, describing the properties of the pendulum and "hydrostatic balances". via @wikipedia
Galileo Galilei at PG:
https://www.gutenberg.org/ebooks/author/39014