Want to watch better-quality PBS Video? Sign in to access HD streaming!
In this episode of SciTech Now, taking farming to a whole new level; a look into fossil data reveals that vision prompted fish to make the leap onto land; cleaning up nuclear waste; and Science Reporter Dave Mosher tells us about his first space shuttle mission story.
Upgrade Your Viewing Experience
This video is available to CallSign viewers with a Passport account. Passport gives you access to a wealth of premium content not previously available online, including full seasons of your favorite shows.