In this series, comparative anatomist Professor Joy Reidenberg and veterinarian Mark Evans explore the life and death struggles of earth's greatest species as they attempt to reproduce in some of the most hostile environments on earth. From the very first mating calls -- through some fabulously flirtatious foreplay -- to heart stopping births where the lives of mother and baby hang in the balance, the series examines the wonderful, weird and sometimes wacky world of animal reproduction.