የኢትዮጵያ ሳይንስ አካዳሚTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoMantegaftot Sileshi Siyoum15 ጥቅምት 2008ሰኞ፣ ጥቅምት 15 2008https://p.dw.com/p/1GuaYማስታወቂያ