Alex, in classical mechanics time is linear, gravity is a force (that moves at infinite speed), and the laws of motion work equally in both directions (forward and backward in time). But, time is unidirectional and relative, and gravity is not a force.
Take what happens at a black hole. As you approach the event horizon your time slows down compared to an outside observer. In fact, if I were watching you fly towards the event horizon of a black hole, time would slow so much that I would never see you reach it - you would essentially appear frozen as you approach it. But as far as you're concerned, time is flowing normally, and it's everything away from the event horizon that's now moving at crazy-fast speeds.
5 Billion years from now the universe will have expanded to the point that all matter will be the same temperature: just a fraction above absolute zero. The universe will essentially be dead. It'll still be here, but there'll be no one to observe it. It will just continue to expand, and eventually even protons and electrons will be torn apart. No one actually knows what will happen at that point, it's entirely possible that a new set of chemical physics will take over, but more than likely it'll just be that instead of frozen atoms scattered about space there'll be frozen quarks leptons and bosons scattered about space with no heat to do anything interesting.
Take what happens at a black hole. As you approach the event horizon your time slows down compared to an outside observer. In fact, if I were watching you fly towards the event horizon of a black hole, time would slow so much that I would never see you reach it - you would essentially appear frozen as you approach it. But as far as you're concerned, time is flowing normally, and it's everything away from the event horizon that's now moving at crazy-fast speeds.
5 Billion years from now the universe will have expanded to the point that all matter will be the same temperature: just a fraction above absolute zero. The universe will essentially be dead. It'll still be here, but there'll be no one to observe it. It will just continue to expand, and eventually even protons and electrons will be torn apart. No one actually knows what will happen at that point, it's entirely possible that a new set of chemical physics will take over, but more than likely it'll just be that instead of frozen atoms scattered about space there'll be frozen quarks leptons and bosons scattered about space with no heat to do anything interesting.
For Religion & Health see:[/b][/size] Williams & Sternthal. (2007). Spirituality, religion and health: Evidence and research directions. Med. J. Aust., 186(10), S47-S50. -LINK
The WIN/Gallup End of Year Survey 2013 found the US was perceived to be the greatest threat to world peace by a huge margin, with 24% of respondents fearful of the US followed by: 8% for Pakistan, and 6% for China. This was followed by 5% each for: Afghanistan, Iran, Israel, North Korea. -LINK
"That's disgusting. There were clean athletes out there that have had their whole careers ruined by people like Lance Armstrong who just bended thoughts to fit their circumstances. He didn't look up cheating because he wanted to stop, he wanted to justify what he was doing and to keep that continuing on." - Nicole Cooke
The WIN/Gallup End of Year Survey 2013 found the US was perceived to be the greatest threat to world peace by a huge margin, with 24% of respondents fearful of the US followed by: 8% for Pakistan, and 6% for China. This was followed by 5% each for: Afghanistan, Iran, Israel, North Korea. -LINK
"That's disgusting. There were clean athletes out there that have had their whole careers ruined by people like Lance Armstrong who just bended thoughts to fit their circumstances. He didn't look up cheating because he wanted to stop, he wanted to justify what he was doing and to keep that continuing on." - Nicole Cooke
