Inquiry is an approach to learning that engages our natural curiosity and desire to make sense of the world.
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This backgrounder describes the three major types of clouds.
Learn about telescopes, how they work & why they're important to astronomers.
What exactly are bacteria? What types of bacteria are there? And are they really as bad as people think they are?
Learn about the basics of viruses in this backgrounder.
The lever is a type of simple machine. Learn about the different classes of levers and how they provide mechanical advantage.
Mitosis is an important part of cell division that helps organisms grow and repair themselves.
Hubble Space Telescope as seen during a servicing mission in 2009 (NASA)
Some astronomers are not looking for stars, planets or galaxies. They are searching for intelligent life in the universe beyond our planet.