[Tycho?]

http://en.wikipedia.org/wiki/Antihydrogen

http://www.physorg.com/news10789.html He's publishing it on Valentines day, and apparently it has been rigorously peer reviewed. Pretty interesting, makes intersteller travel look a tad more feasible.

Why do so many people think they can outsmart the smartest people of the last 100 years with no physics education at all? Seriously. Its like saying you could beat up Mike Tyson. No you can't you idiot, what the hell are you thinking?

This is probably more of a math question than a phyics question. It might not make sense mathmatically, in which case it definately wouldn't be in physics. So I'd ask this over at the math forums if you dont get good responses here.

http://www.wikipedia.org Even massless particles have momentum, so neutrinos do as well.

This is not something anybody knows, since there is a lot we dont know about the nature of time. Like did time have a begining? Is it meaningful to talk about time before the big bang? How did time "start", if indeed it actually did ever start? But you definately can not say for a fact that time is limited. As you pointed out our time, or the time for our universe is limited, but time itself? Who knows.

How would the device actually generate electricity?

Yeah I'm with you. Lifespans will continue to increase, but I doubt the average will go above 100, at least in most places.

Its funny how you quote newtons first law and then make your statement the exact opposite of what the law says. You need a force to accelerate something. No force, no acceleration, no speeding up or slowing down. Things in space will retain a (mostly) constant velocity. You need some external force to cause an acceleration.

So, some guy is proposing that time has multiple dimensions, instead of just the single "4th dimension" that we are all familiar with. He is not a crackpot, and his stuff predicts and explains small errors apparent in time measurement with clocks aboard GPS satellites. You can get a link to the introduction part here: http://www.stanford.edu/~afmayer/

You can reverse chemical reactions, although if energy was released from the initial reaction it means you would have to put in energy to make it go in reverse (and in many reactions it would very difficult to get all the initial reactants).

What are your qualifications? Degree in physics? High school physics? Stuff you read out of a book? Quantum, nuclear, relativity? Post here what kind of physics education you have. I have high school, and half of first year university (my vote was just high school though, I figure half a year doesn't really count). Along with as much stuff as I can learn on my own. My favorite if not nessesarly my expertise is Astronomy stuff. (As an aside, I didn't know before 10 minutes ago that this forum even existed. I have many hundreds of posts, most of the physics forums. But whenever I went to the phyics directory I always went to the subdirectory, like Quantum Physics or the Astronomy forums, I simply didn't notice that the directory itself had a forum you could scroll down into. So I'm also kinda posting to see who else posts here)

I havn't yet read what the second option is, but thats what I would choose. The proposed mars mission would be the most collosal waste of money in human history. Stick to unmanned probes until 1) we get the technology go get to mars more easily and 2) humans actually have a reason to go to mars. Well I read the second one, and it is more worthy. Although I would perfer money being put into something with more direct relevance, like more fusion research (yeah I know they're building ITER, but you can't have too much research). Or explore the ocean for gods sake. Something like 90% of the ocean is totally unexplored. And we KNOW that there is life there.

Thats a pretty foolish statement. He is a highly respected physicist. Other physicists certainly seem to listen to what he says. Cambridge doesn't make you the Lucasian Professor of mathematics if you dont have some sort of authority.

Public transportation only works in major metropolitan areas? Um, no. I live in a city, but I can easily catch a bus to any number of tiny towns and villeges. These busses are usually packed as well, I'd say it works pretty well outside of metropolitan areas.

Depends. For fusion reactions to occur on earth one generally needs temperatures of hundreds of millions K. If you could get fusion going at a few hundred or a few thousand, thats still pretty damn cold by comparison.

We know. If it takes entire industrialized nations decades of research and development, I dont think many people are worried about people building them at home.

Yeah, basically things are lineing up in the CBMR when the distribution should be random. And yeah that is a pretty damn rough article. Line joining our planet to the sun? That would be its distance from the sun, meaning this probe would have an orbit 150 million klicks (1 AU) further out. Which I'm almost certain is not true, I think this device shares Earth's orbit, its just in a different posistion moving in the same direction. So its following or moving ahead of the earth, depending on how you look at it.

Pretty much all of Canada is having a warm winter. Europe on the other hand, particularly Russia and Eastern Europe are having a very cold winter.

You probably wont find handbooks or manuals or things like that. Companies tend to not publish that sort of thing freely on the web, and since its a nuclear power plant they dont really want people knowing their security procedures.

Cold fusion research has continued, and actually gotten some credibility. The original claimed results were never duplicated, but there are extra neutrons in these experiments that cannot be accounted for without some sort of nuclear process taking place. So who knows.