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Dark caves awaken love and curiosity for secrets of nature

Caves used to bethe shelter and first home of the “cavemen” who inhabited the present-day lands of Bulgaria thousands of years ago. To this day, rock formations are important for science and progress of mankind. In the caves, new deposits of..

18.03.20 09:00 |
Всички новини: днес | вчера

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Войната в Украйна