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Dr. Thumbi Mwangi had a eureka moment when he began researching a cattle disease in the U.S. The treatment was the same thing his dad the farmer had him do when he was growing up in Kenya.
أكثر... ??????? ??????: As A Boy, He Learned About Science By Rubbing Calves' Ears || ??????: ahlam1399 || ??????: اسم منتداك
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