Where are the lions and other top predators?

Lion in African savanna.

Why aren’t there more lions when there’s plenty of prey on the African savanna? A team of researchers, including integrative biology professors John Fryxell and Kevin McCann, found that relative amounts of predator and prey biomass in diverse ecosystems around the globe are remarkably well-predicted by a simple mathematical function called a power scaling law.

Professor Stephen Lewis on the scope and nature of self-injury

Stephen Lewis researches the scope and nature of self injury at the University of Guelph

Prof. Stephen Lewis, Department of Psychology, was 15 when he first self-injured by cutting himself. In a TEDx talk delivered earlier this year, Lewis describes how bullying led to a major depression and how over time he became suicidal. The road to recovery was long and difficult, but “I can let others know that as