They studied some fossils to learn about genetic diversity. From these genetic studies, they have decided that:
1) Human expansion diminished the bear population
2) Competition over cave habitat was a critical factor.
Genes can tell us this?
You can call it science if you want, but I call it supposition.
Whut...you don't believe in Jungle Girl?
Yup bunch of slack in those arguments. Hell I wish I could earn a living just making up a bunch of hokey b.s.
What FUN that would be!