Special & General Relativity Questions and Answers
Why can't we travel faster than light?
We do not know, other than nature exacts a severe penalty on any process that tries to do so. This seems to be the way our particular universe is put together. We might not like it, but like many other laws we seem obligated to live by, this is one we have never seen violated and one we will have to live with.
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All answers are provided by Dr. Sten Odenwald (Raytheon STX) for the NASA Astronomy Cafe, part of the NASA Education and Public Outreach program.