To add to your comment in the title "Prehistoric" , "before history", means before the advent of writing, i.e. 5 000 years or so; history originally referring to times that have written records.

"History" itself now refers to the entire Universe timeline before the present. But prehistory cannot mean that, because that would be pre-BigBang.

So the title "Prehistoric babies Drank Animal Milk from Bottles" could refer to 1491 born Guaraní babies drinking Llama's milk from ceramic bottles and a nipple made from the rubber tree. Cool, but of no relevance to a paleo-diet.