Time Travel Used To Be Thought Of

If Time Travel Is Possible, Where Are The Tourists From The Future?

One, Remember To Look Up At The Stars And Not Down At Your Feet. Two, Never Give Up Work. Work Gives You Meaning And Purpose And Life Is Empty Without It. Three, If You Are Lucky Enough To Find Love, Remember It Is There And Don't Throw It Away.

The Lesson Of The Book Is That The Universe Is Governed By The Laws Of Science.

The Human Race Shouldn't Have All Its Eggs In One Basket, Or On One Planet. Let's Hope We Can Avoid Dropping The Basket Until We Have Spread The Load.

I Think The Next [21st] Century Will Be The Century Of Complexity. We Have Already Discovered The Basic Laws That Govern Matter And Understand All The Normal Situations. We Don't Know How The Laws Fit Together, And What Happens Under Extreme Conditions. But I Expect We Will Find A Complete Unified Theory Sometime This Century. The Is No Limit To The Complexity That We Can Build Using Those Basic Laws.