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Featured Videos for the Week of October 6, 2014

To feed your desire to learn something new every day, we've carefully curated a collection of fascinating videos for you to discover throughout the week. Curious about the concept of zero, Nikola Tesla, the Ebola virus and more? Start exploring.

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Key Facts In This Video

  1. Categorically, zero is an even number. 01:19

  2. In Florence during the Crusades, the use of the number zero was banned because it was thought to be connected to the devil. 02:28

  3. Instead of using a symbol for zero, Babylonians would insert a space. 05:01

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Key Facts In This Video

  1. Cheetahs are the fastest land animals on Earth. 00:22

  2. See slow-motion footage of a running greyhound: 01:45

  3. Cheetahs are better than greyhounds at increasing the frequency of their strides. 03:54

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