  Wormholes have been advanced as both a method for circumventing the
limitations of the speed of light as well as a means for building a time
machine (to travel to the past). Thus it is argued that General Relativity may
allow both of these possibilities. In this note I argue that traversable
wormholes connecting otherwise causally disconnected regions, violate two of
the most fundamental principles physics, namely local energy conservation and
the energy-time uncertainty principle.
