ሳይንስዳግም የተዘጋው የኢንተርኔት አገልግሎትTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoሳይንስTesfalem Waldyes Erago30 ግንቦት 2009ረቡዕ፣ ግንቦት 30 2009https://p.dw.com/p/2eHjWማስታወቂያ