Parasite gives wolves what it takes to be pack leaders
From Nature.com:
Wolves infected with a common parasite are more likely than uninfected animals to lead a pack, according to an analysis of more than 200 North American wolves1. Infected animals are also more likely to leave their home packs and strike out on their own.
The parasite, Toxoplasma gondii, makes its hosts bold — a mechanism that increases its survival.
