Males engage in a two-week-long sex marathon with as many females as they can find. Each frenzied encounter can last up to 14 ...

For some animals, reproduction comes at the ultimate cost—their own lives. While this may seem extreme, it's a natural strategy to maximize reproductive success. These species invest everything into ...

The results of inbreeding can be very distressing to witness. In this Instagram post, we see a captive lion with skull ...

In CUriosity, experts across the CU Boulder campus answer pressing questions about humans, our planet and the universe beyond. This week, Marc Bekoff, professor emeritus in the Department of Ecology ...