By creating an account, you acknowledge that PBS may share your information with our member stations and our respective service providers, and that you have read and understand the Privacy Policy and Terms of Use.
Become a WOSU member to enjoy
WOSU
Passport
Get extended access to 1600+ episodes, binge watch your favorite shows, and stream anytime - online
or in the PBS app.
Season 6 Episode 17 | 12m 41s
| Video has closed captioning.
It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds - but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space.
