Congo

The disease's presence in Mbandaka, population 1.2 million, is the first non-rural case in what appears to be a new epidemic of the notoriously contagious disease.

• By Jack Denton

Restoring Africa's peace could be helped by restoring its fabled—and endangered—fauna.

• By Michael Todd

The lust to kill is somewhat normal, and cruelty can have some benefits. But the researchers who are exploring those sad discoveries are also working to bust up the vicious circle that offers these insights.

• By Michael Todd