The Second Dot

What are past, present and future? How do we divide and decide them? You can say past has already passed, present is now, and future is about to come. But how can we certain that “now” really is present? Some say time is like a river, and you can’t go into the same river twice [...]

Recently, I have been reading physics books of Michio Kaku, a very popular physicist, and these books make me wonder a lot. Sometimes I even have to bring back myself from tiny world of quantum particles to our every day world. Is time travel possible? According to Kaku, there is no known law of physics [...]