Isayensi Weird

Kutholwe izinhlanzi ezisamathambo endaweni ephakeme ye-Himalayas! 1

Kutholwe izinhlanzi ezisamathambo endaweni ephakeme ye-Himalayas!

Ososayensi abafunda isiqongo se-Mount Everest, intaba ende kunazo zonke eMhlabeni, bathole izinhlanzi ezisamathambo nezinye izidalwa zasolwandle ezifakwe edwaleni. Kwenzeka kanjani ukuba izinsalela eziningi kangaka zezidalwa zasolwandle zifinyelele endaweni ewugwadule yezintaba zaseHimalaya?
Isisulu sesilingo se-Tuskegee syphilis igazi laso likhishwe nguDkt. John Charles Cutler. c. 1953 © Isikweletu Sezithombe: Wikimedia Commons

Ugcunsula eTuskegee naseGuatemala: Ukuhlolwa kwabantu okunonya emlandweni

Le yindaba yephrojekthi yocwaningo lwezokwelapha yaseMelika eyaqala kusukela ngo-1946 kuya ku-1948 futhi yaziwa ngokuzama kwayo okungekho emthethweni kubantu abasengozini eGuatemala. Ososayensi abathelele abantu baseGuatemal ngogcunsula kanye ne-gonorrhea njengengxenye yocwaningo babazi kahle ukuthi bephula imithetho yokuziphatha.