Link to The universe (T5): Time travel documentary
Documentary Description
One of the Universe's most enduring mysteries is Time Travel. In this
episode, we explore the possibilities. Discover why Time Travel into the
future is unavoidable in the Einsteinian world of Relativity. As for
the past... the laws of physics do not tell us it's impossible, but the
bizarre consequences of going into the past and altering the future make
for mind-bending science. Finally, we go for the future by traveling to
the nearest star, 4.3 light years away... in only 45 days. Our
destination may be an Earth-like planet; a planet scientists are now
hunting for, and may find in the next 3 to 4 years.