What has negative energy got to do with time travel?
It turns out that if you concentrate enough negative energy you could make a time machine. How? First you have to construct a wormhole in space – a sort of stargate or tunnel connecting distant places, so if you jump in one end you would come out light years away. Such a thing would work only if it was filled with negative energy, or something similar. It was discovered by Kip Thorne at the California Institute of Technology that a wormhole could also be used to go back in time. You could jump through one and come out in the past. Are wormholes like black holes? In a way, except jumping into a black hole is a one-way journey to nowhere. A wormhole would have an exit as well as an entrance. Astronomers are convinced black holes are real, but wormholes remain firmly in the realm of speculation. How would you actually make a wormhole time machine? In the book I outline a possible way to do it, starting out with the high-energy collision of two uranium nuclei, followed by explosive magneti
