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SciShow
5 Scientists Too Smart for Their Time
You often hear of brilliant scientific discoveries that took decades to become recognized, often by scientists too smart for their time! Join Hank and look back on a few of our episodes about scientists who deserve a little more...
SciShow
The Cosmic Ladder That Lets Us Map the Universe
Considering how massive our universe is, we know the distances to cosmic objects surprisingly well. What tools and clues do scientists use to measure distances that are so enormous they sound like made-up numbers?
SciShow
5 Undervalued Scientists: Great Minds Compilation
Take some time with us to look back on a few of our episodes about scientists who deserve a little more recognition than they got.
Khan Academy
Khan Academy: Stars, Black Holes and Galaxies: Cepheid Variables 1
Describes the impact of Henrietta Swan Leavitt's work on Cepheid variable stars. She discovered a linear relationship between the relative luminosity and the period of these variable stars. This enabled astronomers to estimate how far...
Khan Academy
Khan Academy: Cepheid Variables 1
A video exploring what Cepheid variable is and how it was discovered. [9:23]