Gravity relentlessly pulls us toward Earth's surface. Everything we do requires us to expend energy, and much of that energy goes toward our struggle against gravity. Despite the powerful force that gravity exerts, we...
Volcanoes provide spectacular evidence that we are living on a dynamic planet, where land can be created or destroyed without regard to human structures or civilizations. This interactive resource adapted from the...
Most people will never see the eruption of an active volcano. Even so, evidence of these dramatic displays can be found all over the world. In fact, more can be learned about some aspects of volcanic activity by...
In 1996, US entrepreneur and explorer Gary Comer took his small boat through the Northwest Passage in 19 days, a route that had once been ice, but was now easily navigated open water. This radio broadcast weighs up the...
Tornadoes can produce damage that ranges from broken tree limbs to a block of houses swept from their foundations. They can inflict utter devastation across a wide swath of land or, destroy one house and leave others on...
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