Yes, at large scales space expansion can sort of make it so energy is not conserved: http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved

Yes, at large scales space expansion can sort of make it so energy is not conserved: http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/ http://www.preposterousuniverse.com/blog/2010/02/22/energy-i... Depending on how you look at it, anyhow. One way or another you end up with some sort of unintuitive concept being introduced.