Mankind's Greatest Achievements Have Come About By

The Real Challenge Is To Work Out What Aliens Might Actually Be Like.

Speech Has Allowed The Communication Of Ideas, Enabling Human Beings To Work Together To Build The Impossible. Mankind's Greatest Achievements Have Come About By Talking, And Its Greatest Failures By Not Talking. It Doesn't Have To Be Like This. Our Greatest Hopes Could Become Reality In The Future. With The Technology At Our Disposal, The Possibilities Are Unbounded. All We Need To Do Is Make Sure We Keep Talking.

Time And Space Are Finite In Extent, But They Don't Have Any Boundary Or Edge. They Would Be Like The Surface Of The Earth, But With Two More Dimensions.

The Boundary Condition Of The Universe Is That It Has No Boundary.

I Was Not A Good Student. I Did Not Spend Much Time At College; I Was Too Busy Enjoying Myself.