Time Travel

This. Time Travel would cause complete and utter chaos, from people wanting to correct their mistakes, or meet their ancestors ripping apart the linear structure of time.

Time Viewing is theoretically possible, if we used the method already mentioned travelling to a distant object, say 800 light years away.then looking back at Earth through an ultra super WTFHAX powerful telescope, we'd be viewing the earth as it was 800 years ago. Problem is, this doesn't help us go back in time, as we are viewing reflected light 800 years old, so instantaneously transporting back would just take you back to the same instance in time as when you left (plus however long you were looking at the past).

Besides, Time itself is more of a concept than actual reality, IMO. "Travelling into the future" would be as easy as sleeping for a day or two.

 

I wouldn't say impossible, but chaotic. If you altered the past, our future would be ****ed up. So it's possible, but shouldn't be done.