Mali has withdrawn from a global alliance of French-speaking countries, days after two of its neighbors took the same step.

A separatist group in Mali said an airstrike on a market in the country’s north has killed at least 18 people. Mali’s army said its attack targeted armed militants.

One of Griaule’s most famous (and controversial) claims was our ostensible knowledge of Sirius B, the companion star to Sirius. Invisible to the naked eye, Griaule found oral traditions describing ...