While studying lions in Zambia, biologist Thandiwe Mweetwa noticed synchronised estrus cycles.
Britons are keeping tigers, killer cobras, and wolves as pets.
But they may help ward off biting flies.
The lions were featured on a long-running BBC wildlife series.
The good news: Their populations are growing in four southern African countries.
As governments ban circus animals, advocates are stepping in to save the creatures.
The owner of the lions will not be fined by Italian authorities.
More than 3,000 lion parts were legally imported to EU countries from 2004 to 2013.
The death of a 13-year-old lion at the hands of an American hunter has sparked an international outcry.
The lion, known for his gentle demeanor, was reportedly shot with a bow and arrow in Zimbabwe.
If the settlement is finalized, Joe Paterno will regain his title as coach with the most wins at a college level.