21 | The Manhattan Project 2021-10-07 |
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22 | The Evolution of Crocodiles 2021-09-16 |
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23 | Longitude 2021-05-13 |
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24 | Pierre-Simon Laplace 2021-04-08 |
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25 | The Late Devonian Extinction 2021-03-11 |
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26 | Emilie du Châtelet 2021-02-04 |
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27 | Eclipses 2020-12-31 |
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28 | Alan Turing 2020-10-15 |
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29 | Paul Dirac 2020-03-05 |
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30 | The Evolution of Horses 2020-02-27 |
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