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| Spiral vs. Barred Spiral Galaxies |
1. 10 Strangest Things in Space
2. Quantum Theory of Gravity
3. All About the Milky Way
4. Live Camera of the Earth from the International Space Station (If the ISS is on the "night"side of the Earth, you won't see anything.)
5. Reducing Friction Helped Build the Great Pyramids of Egypt
