ሳይንስ To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስMantegaftot Sileshi Siyoum1 የካቲት 2009ረቡዕ፣ የካቲት 1 2009 https://p.dw.com/p/2X8drማስታወቂያ