Stephen Hawking

Imaginary time is a new dimension, at right angles to ordinary, real time.

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.

One can't predict the weather more than a few days in advance.

You probably found 'How to Survive a Robot Uprising' in the humor section. Let's just hope that is where it belongs.

I'd be all for everybody keeping their sidearms if they're in the military and on a military installation. That's something we need to get back to.

Perseverance is a positive, active characteristic.