Are We Alone in the Universe?

"It's actually profound either way. If we find out that the universe is teeming with life and other civilizations, and we can learn about them, that would be spectacular; maybe it's like the archaeology of our future," Tyson said. "If we found out that we're all alone, that is also profound. It means life is extremely precious, and we better take care of life on this planet."

Looking up and wondering about our place in the universe, and how it all began, is an ancient and constant preoccupation of mankind. Tyson, who has devoted his life to that search, says, "It may be fundamental to what it is to be alive. To what it is to be human."

Click here to visit Stephen Hawkings' Web site and learn more about his research.

Click here to read more about Dan Wetheimer's search for extraterrestrial life at the University of California at Berkeley.

Click here to visit Neil Tyson DeGrasse's Web site and learn more about his research.

Click here to read more of the latest science news in Astrobiology magazine.

Click here to visit NASA's Web site.

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