Sida uu Geeska Afrika ka soo xiganayo tiro-koobkii ugu dambeeyey ee ay jaamacadda Carnegie Mellon ee dalka Maraykanku bishii hore ka soo saartay dadka dunida ugu dhinta shilalka ay sababaan sawirradani ayaa muujinaysa in kala badh dadka sannadkii hore shilal noocan ah u dhintay ay u dhasheen dalka Hindiya.
