Yordan Yordanov
  • Bulgaria
  • Member for 4 years, 8 months
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Academia 648 rep 4 silver badges18 bronze badges
Chemistry 631 rep 5 silver badges12 bronze badges
Biology 288 rep 2 silver badges13 bronze badges
Philosophy 288 rep 2 silver badges12 bronze badges
Physics 111 rep 1 silver badge6 bronze badges

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