Is it possible for anything to travel faster than light? What about tachyons? How would faster-than-light travel break causality? And just what the heck is causality, anyway? I discuss these questions and more in today's Ask a Spaceman!

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Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com).