"If you believe in science, like I do, you believe that there are certain laws that are always obeyed.
"I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws.
"Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.
"I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.
