Calestous Juma, 64, Dies; Sought Innovation in African Agriculture Professor Juma believed that science, particularly biotechnology, could play a major role in improving life in Africa. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Scores of Dead Elephants Found in Botswana ‘Poaching Frenzy’Autumn Equinox 2018: When is the September equinox? When is the first day of autumn?Pruitt’s Spending on Security More Than Doubled in 11 Months, E.P.A. Investigator SaysNASA asteroid WARNING: Asteroid bigger than Big Ben headed for Earth NEXT WEEKGreen Comet 21P approach: WATCH moment Green Comet lights up in the night skyYellowstone volcano FIRE: NASA satellites reveal inferno in park's BIGGEST ever wildfire