Curated OER
Mining the New American West
The Mining Act of 1872 allows mining companies to purchase land from the U.S. Government at 1872 prices - about $5.00 an acre! This video features the town of Crested Butte, Colorado, and a mountain just outside of town that was...
TED-Ed
The Survival of the Sea Turtle
Sea turtles face a lot of adversity: storms, predators on land and in the sea, and eggs that don't hatch, but the biggest threat to these magnificent and ancient creatures is human activity. From poaching to pollution, from trash to...
Curated OER
Denver's Brown Cloud
Why does a brown cloud occur in Denver at a certain time of the year? When warm air is higher in the atmosphere, it traps cooler, denser air below and smog just sits in between them. Using bottles of colored hot and cold water, this...
Steve Spangler Science
Denver's Brown Cloud - Cool Science Experiment
Why does a brown cloud occur in Denver at a certain time of the year? When warm air is higher in the atmosphere, it traps cooler, denser air below and smog just sits in between them. Using bottles of colored hot and cold water, this...