NELLIE PEYTON BY the end of this century, typical daily temperatures in West Africa will be even higher than those registered on the hottest days of the year at present, according to a new study by climate scientists in Britain. The research found that on a typical day in May 80 years from now, temperatures could exceed 50 degrees Celsius (122F) in parts of northern Senegal, southern Mauritania, Mali, Niger and western Chad - seriously affecting health and livelihoods. Minimum temperatures in May could rise to 30C from about 19C today in Niger and central Mali, and to 31C from…