A little more than a year ago, on a trip to Nairobi, Kenya, some colleagues and I met a 12-year-old Masai boy named Richard Turere, who told us a fascinating story. His family raises livestock on the ...

If you’ve skipped ahead and want some pointers before looking at the Contexto answer, we have a bunch of hints that you can use to guess today’s answer. Contexto gives you clues and numbers based on ...