Humanity is cutting down its forests, apparently oblivious to the fact that we may not be able to live without them.

To test a perfect theory with imperfect instruments did not impress the Greek philosophers as a valid way to gain knowledge.

Life is a journey, but don't worry, you'll find a parking spot at the end.

Science can amuse and fascinate us all, but it is engineering that changes the world.

It is the writer who might catch the imagination of young people, and plant a seed that will flower and come to fruition.

They won't listen. Do you know why? Because they have certain fixed notions about the past. Any change would be blasphemy in their eyes, even if it were the truth. They don't want the truth; they want their traditions.

What do you call that nice, shiny white metal they use to make sidings and airplanes out of? Aluminum, right? Aluminum, pronounced 'uh-LOO-mih-num', right? Anybody knows that! But do you know how the British spell it? 'Aluminium', pronounced 'Al-yoo-MIH-nee-um'. Ever hear anything so ridiculous? The French and Germans spell it 'aluminium', too, but they're foreigners who don't speak Earth-standard. You'd think the British, however, using our language, would be more careful