I would like to fly in space.Absolutely.That would be cool.I used to just do personally risky things， but now I’ve got kids and responsibilities， so I can’t be my own test pilot.That wouldn’t be a good idea.But I definitely want to fly as soon as it’s a sensible thing to do.

What is love except another name for the use of positive reinforcement? Or vice versa.

在科学中，最重要的不是获得新的事实，而是发现新的思考方式。