Lecture_Chap_18_3-13_

Lecture_Chap_18_3-13_ - Lights and UFO's come and go in the...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Lights and UFO’s come and go in the night sky. Men and women, troubled at last by the things they have built, may toss in their sleep, or dream bad dreams, or lie awake while the meteors whisper greenly overhead. But nowhere in all of space or a million worlds of the galaxy will there be human beings to share our loneliness. There may be wisdom, there may be power; somewhere across space great instruments, handled by strange manipulative organs, may stare vainly at our floating cloud wrack, their owners yearning as we yearn. Nevertheless, in the nature of life and in the principles of evolution we have had our answer. Of human beings, elsewhere and beyond, there will be none, forever. Loren Eisley from The Immense Journey (slightly altered)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Revised review sheet and sample final are posted. Extra Credit through 3/11 is posted in MyUCLA. Check you grades. Double the percentage to get your extra credit points. Report any discrepancies to me before the exam. No office hour this afternoon. Office hours exam week 2:30 Monday, 11 Tuesday Exam 3 PM Tuesday Entire class in La Kretz 110 Locate this room before the exam. Bring picture ID
Background image of page 2
Life in the Cosmos “. . . during the past 5 to 10 billion years of galactic history our Galaxy must have housed close to one billion independent civilizations.” Michael Papagiannis (Mercury 1982, 11:14) “. . . no technological society which has advanced more than a century beyond us exists now, or has ever existed in the Galaxy.” Frank Tipler Mercury 1982, 11:10)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fermi Paradox Where are they???
Background image of page 4
The Necessities of Life • Carbon, oxygen, hydrogen • A few other elements (N, S, Fe, P, etc.) • Energy (usually starlight) • Liquid Water
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 35

Lecture_Chap_18_3-13_ - Lights and UFO's come and go in the...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online