“If you still believe that aliens would travel hundreds of light years to carve temporary graffiti in our wheat, then your imagination is one of the seven wonders of the world, and should be bronzed.”

“Like prospecting in the 19th century, reconnaissance of the asteroids would of necessity take place in an arena where trouble is likely and help is distant. Heroic stories of individual triumph and...”

“If you could drive straight down, into a tunnel bored through the crust of the planet, you'd hit this molten mess in about an hour. It's called the asthenosphere - a sluggish sea, several hundred m...”

“Plate tectonics is not all havoc and destruction. The slow movement of continents and ocean floors recycles carbon dioxide dissolved in the oceans back into the atmosphere. Without this slow speed ...”

“The stars look the same from night to night. Nebulae and galaxies are dully immutable, maintaining the same overall appearance for thousands or millions of years. Indeed, only the sun, moon and pla...”

“Each year, thousands of UFOs are sighted and reported, which is an impressive tally of unidentified aerial phenomena. Surveys show that roughly one-third of the populace believes that at least some...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”

“One of the new things people began to find out in the last century was that thoughts- just mere thoughts- are as powerful as electric batteries- as good for one as sunlight is, or as bad for one as...”

“I have seen these persons speak unthinkingly, not realizing that to speak is also to be. Word and gesture are man's thought. We should not speak without reason.”

“Iron turns red when it corrodes, and copper turns green. Meat turns to maggots, and thoughts turn to speech.”

“If you want something new, you have to stop doing something old”

“I can't understand why people are frightened of new ideas. I'm frightened of the old ones.”

“Each voice carries a portion of value, no matter how unpalatable or distasteful that voice may be: no one person, government, ideology, transnational, or religious institution can own and dominate ...”