The males of what animal have a voice box that occupies more than half their body cavity?
The fearsome anglerfish are all of which sex?
In which species do males spend their entire lives inside the female’s digestive tract?
Paranthropus robustus, which lived around 2 million years ago, showed greater sexual dimorphism than modern humans.
The ancient primate species Paranthropus robustus lived approximately 2 million years ago. How much larger were males on average than females?
In which two species are the females more often larger than the males?