![](http://www.ecns.cn/hd/2020/05/14/802d9e7bf23b44c1b6aaad65f9745eb6.jpg)
Bulgarian local guide Zhelyazko Velikov shows the excavations site at the Bacho Kiro Cave, near the city of Dryanovo, northern Bulgaria, on May 13, 2020. Scientists say a tooth and bone fragments discovered in the Bulgarian cave of Bacho Kiro have revealed the earliest proven presence of Homo sapiens-or modern humans-on the European continent. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/05/14/156a563b81e940e9bf36da6bd1324b55.jpg)
A local guide and visitors walk in the site of the Bacho Kiro Cave, near the city of Dryanovo, northern Bulgaria, on May 13, 2020. Scientists say a tooth and bone fragments discovered in the Bulgarian cave of Bacho Kiro have revealed the earliest proven presence of Homo sapiens-or modern humans-on the European continent.(Photo/Agencies)
![](http://www.ecns.cn/hd/2020/05/14/2026eae2f8d34832b86c5d79fcc1dac3.jpg)
Bulgarian local guide Zhelyazko Velikov walks inside the Bacho Kiro Cave, near the city of Dryanovo, northern Bulgaria, on May 13, 2020. Scientists say a tooth and bone fragments discovered in the Bulgarian cave of Bacho Kiro have revealed the earliest proven presence of Homo sapiens-or modern humans-on the European continent.(Photo/Agencies)
![](http://www.ecns.cn/hd/2020/05/14/7578f8d89842441aa58a684008057a64.jpg)
A guard unlocks the entrance of the Bacho Kiro Cave, near the city of Dryanovo, northern Bulgaria, on May 13, 2020. Scientists say a tooth and bone fragments discovered in the Bulgarian cave of Bacho Kiro have revealed the earliest proven presence of Homo sapiens-or modern humans-on the European continent.(Photo/Agencies)