That's what was said, as theory, in Earth I think. Whether more gets said or disproved afterwards I don't know yet because I've only watched up to Time. Which was awful btw and I pretty much love everything with time travel in it.
There is one gorgeous woman on this show that appears to be a minor character
The Chloe character (who I initially thought was Summer Glau but isn't) is boring as all crap. Oh no, my daddy is dead lets have sex we're going to die too. Maybe she'll improve and get a personality.