Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
Rough Science
Explore the Challenges
Solve the Web Challenge
Meet the Rough Scientists
About the TV Series
Discover More
Site Map
Explore the Challenges

The Challenge: Build accurate clocks, construct a timepiece that chimes and make a portable 'watch'

To tell the time in a Rough Science environment — where we only have access to a tool kit, rope, buckets, hoses and old scrap — it is probably easiest to use the sun, a local ingredient which was thankfully in plentiful supply. The one point that is relatively easy to determine by using a sundial is local noon. But how do we make the sundial tell the time accurately, how do we get a clock to chime, and with the rough components on the island, how will we ever make a wristwatch?