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Learn the differences between sedimentary, metamorphic, and igneous rocks.
Runtime: 5 minutes
1964 Quake: The Great Alaska Earthquake
4 Awesome Discoveries You Probably Didn't Hear About This Week (Episode 17)
4 Awesome Discoveries You Probably Didn't Hear About This Week (Episode 21)
A Forest After Fire
A World On Fire: Wildfire And Climate Change In The Past, Present, And Future
Adventures of a Maritime Archaeologist: Ocean Time Capsules
Adventures of a Maritime Archaeologist: What Is Maritime Archaeology?
Agate Fossil Beds National Monument
Alibates Flint Quarries National Monument
All About the Holidays: Summer and Winter Solstice
