Explore the robust port town of Varna, Bulgaria, renowned as a scenic tourist destination in the Balkan region
The Black Sea port and beaches of Varna, Bulgaria.
Encyclopædia Britannica, Inc.
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Contunico © ZDF Studios GmbH, MainzOverview of Prague.
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Encyclopædia Britannica, Inc.Media Editor: Lee Goldstein
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Encyclopædia Britannica, Inc.Media Editor: Lauren Sims
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© Open University (A Britannica Publishing Partner)Learn about Fritz Zwicky and his inference of the existence of dark matter.
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Encyclopædia Britannica, Inc.
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Contunico © ZDF Studios GmbH, MainzEgyptian, griffon, and cinereous (Eurasian black) vultures feeding on a dead goat in Bulgaria's Rhodope Mountains.
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Encyclopædia Britannica, Inc.Marble quarrying and fabrication near Velingrad, Bulg.
