History
The trees remember: Sheepherders’ carvings preserved in the San Juan Mountains
As Hispanic sheepherders roamed the mountains, often alone for months at a time, they carved names, dates and drawings into the soft bark of aspen trees.
Electric Current: Crash Course Physics #28
Explore the world of physics, motion, and energy with Dr. Shini Somara.
Electric Current: Crash Course Physics #28
Season 1 Episode 28 | 8m 11s | CC
Electric current works like a river... kinda... Instead of flowing based on elevation, electric current works a little differently. But it's a good metaphor. In this episode of Crash Course Physics, Shini talks to us about electric current, voltaic cells, and how we get electric charge.
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