Have you noticed how much money they spend to tell us things that we already knew? They spent two billion dollars to tell us that men and women think differently, HELLO! What scares me more is some of the things that they predict! They say time travel is coming, I have a serious problem with that. The first law of physics is that any particular matter can only exist in one place at any given time, a molecule can not be in two places or more at the same time; makes sense right? If a person is transported back in time where the molecules that make up their being already exist, the same molecules would be existing in two different places at the same time. the only way around this would be if the molecules were stripped from where they were at the time and reformed into the person doing the traveling. If this was done the problem would be solved, except what if those molecules were important where they were before they were stripped away; like in the trigger restraint of an atomic bomb. That could be embarrassing, huh! Talk about changing the past,lol. So what if they could transport somebody back and did not have to strip away the molecules; that would mean that the first law of physics was wrong. The very foundation of all of the laws and principals that were used to build the time machine to start with would be proven wrong. Would you really want to be the first person to take that trip?