We don't let animals suffer, so why humans?

The world has changed far more in the past 100 years than in any other century in history. The reason is not political or economic but technological-technologies that flowed directly from advances in basic science. Clearly, no scientist better represents those advances than Albert Einstein: TIME's Person of the Century.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

When I hear of Schrödinger's cat, I reach for my pistol.

[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.

One could imagine such technology outsmarting financial markets, out-inventing human researchers, out-manipulating human leaders, and developing weapons we cannot even understand.

Eternity is a long time, especially towards the end.