Polio paralyzed Sani Muntari as a child. That didn't keep him from school or off the soccer field. And he's played a key role in making Nigeria polio-free.
The Alexander Soros Foundation has given awards to people trying to block a British company from doing drilling in the park. The activists fear the operations would damage human and wildlife habitats.
We found out when we talked to some of the 500 high schoolers who came to Johannesburg for a model U.N. We also learned a few of their favorite phrases.
Over large parts of the continent, their numbers could drop by half in the next two decades. Only in four countries in southern Africa is the species holding its own.