ሳይንስየሳይንሱ ዓለም አበይት ክስተቶች 2016To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስMantegaftot Sileshi Siyoum19 ታኅሣሥ 2009ረቡዕ፣ ታኅሣሥ 19 2009https://p.dw.com/p/2UyWkማስታወቂያ