[After looking at a Homo erectus skull and skeleton]
It doesn't look apelike at all. There are many explanations for how homo erectus' could have some of those traits...take brow ridges. As a YEC, I believe that the world's earliest humans indeed lived to be hundreds of years old....this belief is not only stated in the Bible -- a historical document -- but also passed down through generations of American Indians and even Europeans. So the point is that since homo erectus was probably a long-lived person, he/she probably matured and developed much slower than modern humans do. In this way, his bones were probably softer for a longer period of time because, as you know, kids' bones are softer and more pliable than adult bones are. If it was the case, then, that homo erectus was a hunter, then his diet probably consisted mostly of meats.....chewing meat requires more jaw strength and probably puts more pressure on the brow plates, causing them to enlarge due to this need for extra strength and support...and having soft bones for longer periods of time, homo erectus probably just developed this anatomical feature due to diet.