This week's question concerns the concept of time travel. Usually the topic of science fiction books and movies, two of the world's most respected physicists, Stephen Hawking and Michio Kaku, assert that time travel could become a scientific reality. In a recent AOL Science article, both scientists cited Einstein's belief of a fourth dimension -- known as time -- as grounds for the possibility of time travel. They also suggest wormholes and black holes could be useful in achieving time travel.
What do you think? Is time travel possible?