As far as we have been able to prove, but it is theoretically possible that loops could be created under certain circumstances where we could travel back in time to an earlier date. We are all time travelers in the fact that we are all moving forward in time right now. It is possible to travel very far into the future by traveling near the speed of light and slowing time down for the traveler.
and for all whoivans out there, people asume time is a strict prgression from cause-to-effect, but actually from a non-linear, non-subjective point of veiw. it's actually a big ball of timey-wimey, wibbly-wobbly...stuff.
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no a snake cannot move in a straight line as its bones are not stretchable_^^^^^^^^^^&
A straight line on a distance - time graph represents a "constant velocity".
A straight line with a positive slope on a position-time graph is the graph of an object that's moving in a straight line with constant speed.
a verticla line
2 points. However, the farther apart the 2 points the striaghter the line will be, unless you move the straight edge!!.