Huge global reaction to BBC investigation on #Sexforgrades

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Over the past 24 hours the hashtag sex for grades has been trending on Twitter after the BBC's Africa Eye went undercover to examine allegations of sexual harassment by lecturers at universities in West Africa. President Trump has defended his decision to pull US troops out of northern Syria, but he repeated his warning to Turkey not to take advantage of the withdrawal. Why do so few women scientists win the Nobel Prize?