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04:28 Why are there so many types of apples? – Theresa Doud Science · September 22, 2016 393 150 188 873
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04:56 Would you sacrifice one person to save five? – Eleanor Nelsen Science · January 12, 2017 1 240 575 3K 877
04:36 Would winning the lottery make you happier? – Raj Raghunathan Science · February 7, 2017 437 725 2K 878
01:50 How Braille was invented | Moments of Vision 9 – Jessica Oreck Science · March 7, 2017 375 300 635 879
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