WATCH: How Long Would It Take to Fall Through Earth?
width="700″ height="414″ allowfullscreen="allowfullscreen" seamless="seamless"> If you stood on the surface of Earth at one point, and you had a …
width="700″ height="414″ allowfullscreen="allowfullscreen" seamless="seamless"> If you stood on the surface of Earth at one point, and you had a …