ሳይንስየሐረማያ ዩኒቨርሲቲ አስተዋጽኦTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስMesay Tekilu20 የካቲት 2011ረቡዕ፣ የካቲት 20 2011https://p.dw.com/p/3EDTdማስታወቂያ