In addition, the company has added two skull patterns: New Skulls features realistic skulls, and Black Skulls has whimsical skulls and crossbones. (petbusiness.com)
The new skull tells us that H. erectus evolved in a mosaic fashion, with some aspects of the skull changing before others, says Spoor. (newscientist.com)
The shape of the brain case was the first to change: the new skull has a braincase shaped like a typical H. erectus despite its small size. (newscientist.com)