First of all, Time Travel is scientifically possible. Read Brian Greene's excellent book - The Fabric of The Cosmos (reviewed here). Even better, watch the 4-part PBS special by the same name if you can find it on YouTube or somewhere.
Secondly, since I happen to be a Time Traveler (or, as we in the trade call it, "Chrono-Hopping"), the point is moot.
Third, Bones is a pathologist. She'd know as much about Quantum Physics as I'd know about Forensics.
Check, Check, and Mate.
