Feed Science Daily: How Our Ancestors Were Like Gorillas (sciencedaily.com)
Some of our closest extinct relatives had more in common with gorillas than previously thought. Fossils illustrate sex differences in growth and the costs of being a male. One of the anthropologists said "When we examined fossils from 1.5 to 2 million years ago we found that in one of our close relatives the males continued to grow well into adulthood, just as they do in gorillas. This resulted in a much bigger size difference between males and females than we see today."