Both are fine, if you remove the comma in your example, but the one used in the article puts the focus on "eating" first. It's also more interesting to read: "B

Both are fine, if you remove the comma in your example, but the one used in the article puts the focus on "eating" first. It's also more interesting to read: "By eating them..." (who ate who or what?) ..."hyenas gathered neanderthal skeletons" (oh good, interesting archeology, I'll check it out) etc.