Biologist Day in Guatemala
Biologist Day in Guatemala is held on February 21. This event in the third decade of the month February is annual. 
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Mario Dary Rivera (El Salvador, February 21, 1928 - Guatemala, December 15, 1981) was a Guatemalan national scientist (pharmaceutical chemist) and conservationist and founder of the School of Biology in Guatemala. In honor of Mario Dary, the "Day of the Biologist" is celebrated in Guatemala every February 21.
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