Up Next
Back to Show
Ancient Skies
The Marine Chronometer
Take a closer look at John Harrison's Marine Chronometer, the device that solved the longitude problem.
Support Provided By
Unlock with PBS Passport
54:38
A cast of scientific pioneers reshape our solar system.
Unlock with PBS Passport
55:14
Episode two charts our efforts to give the earth shape and place in the cosmos.
Unlock with PBS Passport
55:15
Explore the earliest origins of our relationship with the skies.