San Antonio College Library

Describes the physical and chemical evolution of the Earth, providing information on plate tectonics, geological cycles, volcanism, isotopic techniques, age dating, mass extinctions, and other related topics.

"Beliefs in mysterious underworlds are as old as humanity. But the idea that the earth has a hollow interior was first proposed as a scientific theory in 1691 by Sir Edmond Halley (of comet fame), who also suggested that there might be life down there as well. Hollow Earth traces the many surprising, marvelous, and just plain weird permutations his ideas have taken over the centuries." "Both Edgar Allan Poe and (more famously) Jules Verne picked up...

Studies the evidence that scientists believe proves that the earth is more than four billion years old.

Provides an illustrated narrative of Earth's 4.6 billion-year history and the progress science is making in deciphering its mysteries.

How on earth do you build a planet that is just right for life? What do you need to build a planet like ours, and what happens if you get anything wrong? With eye-popping graphics, we open up a cosmic toolbox to work it out. Building the whole thing, piece by piece, from the top of a very high tower in the Californian desert.

We're living in a brief window of time where our planet isn't frozen underneath a giant layer of glaciers. How much longer will the moderate climate that we've come to know as "normal" continue? This episode looks at how the changes in our planet's orbit and rotation impacts our climate.

Knowledge of the physics and chemistry of the planet's "bones" is essential to a complete understanding of Earth science. Ranging from the Mohs scale and specific gravity to silicates, carbonates, and halides, this video delves deeply into the composition, properties, and classification of rocks and minerals. An element of forensic-type analysis is also brought into play, since any stony formation represents a portion of the planet's history and local...