I have a very bad feeling about this.
Ronald Mallett, a UConn physicist, is seriously trying to build a time machine. It's not certain he will be successful, even though all he's trying to send through time right now is a neutron. Other physicists, while they admit the theoretical feasibility of the concept, are skeptical that it can be executed: Stanley Deser, of Brandeis commented:. ''This is about trying to amass all the matter of the universe in a very small region... Good luck.''
No, Dr. Mallett is not going to be able to amass all the matter in the universe.
He says that if he can time-travel a neutron (is there even a transitive verb meaning 'to cause something to travel through time'?), then time-traveling a human being becomes just an engineering problem. Now, about that problem with people going back and changing the past? "There would be government laws to control time travel, he believes."
And as we know, the human race is always law-abiding. I'm getting an image of Abraham opening the door of his tent one morning to find a 23-year-old Palestinian guy there, with the Koran in one hand and a detonator in the other.
As I said, I'm getting a very bad feeling about this.