Who discovered that mostly all objects fall at the same speed -- despite their weight and mass?

Question

Who discovered that mostly all objects fall at the same speed -- despite their weight and mass?

Answer 1

Galileo

Answer 2

Galileo Galilei 1564 - 1642

Galileo Galilei was an Italian scientist who formulated the basic law of falling bodies, which he verified by careful measurements. He constructed a telescope with which he studied lunar craters, and discovered four moons revolving around Jupiter and espoused the Copernican cause

Answer 3

Sir Isaac Newton.

Answer 4

Newton I believe