The Large Hadron Collider accidentally sent you all back in time. Many scientists now here frow the labs, been sent to another world. Dinosaur monsters. 
Barren like world.
Will people survive. Make towns. Or die out.
Many parts of the labs also here. Maybe if you was in a garage or car, part of it came with you. In your world, the alien life goes to your world. 
If you did make it back to your universe, it still have parts of this world to. These worlds was Dimension smashed together.
Giant bee