ሳይንስዓለም አቀፍሳይንስ እና ቴክኒዎሎጂTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስዓለም አቀፍEndalkachew Fekade18 ነሐሴ 2014ረቡዕ፣ ነሐሴ 18 2014https://p.dw.com/p/4Fzi9ማስታወቂያ