ሳይንስበሕክምናዉ ዘርፍ የዘንድሮ ኖቤል ተሸላሚTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስMantegaftot Sileshi Siyoum25 መስከረም 2009ረቡዕ፣ መስከረም 25 2009https://p.dw.com/p/2Qsk7ማስታወቂያ