Mr Monkeybat

Well then obviously faster than light travel has distorted time and these Saucer occupants are humans from the future after the invention of warp drive. The blond ones are from some neo Nazi space colony who went off to escape the chaotic neo Trotskyite Earth. Who after a few hundred thousand to a million years living on a planet orbiting a Red Dwarf to avoid sunburn evolved large eyes to see in the dim light and slight bodies due to low gravity and mechanical devices becoming these guys: So all the different aliens are just future humans from different planetary colonies and different times and stages in future evolution! Disclaimer: I was not in a very serious mood when I wrote this post.

I must admit my understanding of relativity is not great but here are a couple of ideas that have been puzzling me lately. A)If I build a particle accelerator in the shape of an oval. At one side the plasma is accelerated to near the speed of light and on the opposite side the plasma is decelerated back down to less weird speeds and fed back into the accelerator. If these components are efficient most of the energy I put in is the accelerator on one side is recovered in the decelerator on the other side and recycled. But the plasma is going at different speeds at the two curved ends of the oval, according to Relativity the protons traveling near the speed of light have more mass than the slower ones at the slow end of the oval . So the bend at the fast end of the oval is deflecting more angular momentum. Implying net thrust. What am I missing here? How is the conservation of energy and momentum maintained? Or have I invented a Reaction less Motor? B)Theoretically light can be converted into mass and mass can be converted into light. So supposing I had a means of doing this efficiently I can turn do it back and forth with no extra energy required. So If I turn mass into light at the bottom of a hill, I can beam it to the top of the hill turn it back into mass, use it to run a hydro plant, then turn it back into light at the bottom of the hill again and I have more energy than I started with.