981 Sciences via MoviesWeek 11:

Aliens- • Do they exist? • Can we meet them? • Are they good or evil?

To create an extraterrestrial civilization, you need an inhabitable planet.

Criterion 1: Close but not to close to a sun-like star; so that the temperature is between 0-800C.

r

There are as many as 100 billions of stars in our galaxy.

Criterion 2: The right mass for trapping an atmosphere

6400Km

100Km

Criterion 3: Water! Water! Water!

A strike on Moon by NASA last Friday have shown the existence of water.

Dry water channels on Mars

Why water matters?

energy

CO2

Fuel cell

electricity

Food!

What about life?

地球生命的緣起之探索：Miller實驗 1

953模仿磐古大

氣

模仿磐古海

洋

生命的分子：氨基酸 Amino Acid

Miller 實驗： 1953 產生 5種， 2007 產生 22 種。

大自然中有 22種，生物體中有 20種。

氨基酸序列-

蛋白

質

Can we meet each other?- The odd of getting a message from ET

http://www.youtube.com/watch?v=kNAUR7NQCLA the introducing scene of Contact (1997)

100 光年

SETI:Search for ExtraTerrestrial Intelligence無線電波的增加地球在宇宙間的可視度

不斷擴張

終於可以讓人知道我的存在

假設 Kennedy 沒處理好「古巴危機」

42 光年

1905 1945 1962

稍縱即失

當無線電薄殼通過時對方正好有無線電科技才能知道我的存在

Are aliens good or evil? Benign or malignant?

http://www.youtube.com/watch?v=mYCBgSRNjk0 alien landing, close encounters of the 3rd kind (1977)

Good

Are aliens good or evil? Benign or malignant?

http://www.youtube.com/watch?v=-c0Myr_sYsE

A trailer of War of the Worlds (2005)Evil

Are aliens good or evil? Benign or malignant?

http://www.youtube.com/watch?v=ojhGdRSkiUw

A trailer of Alien (1979) Neither

2001 (1968)http://www.youtube.com/watch?v=c1IPrx-zC1Y

Passage through a wormhole

Contact (1997)http://www.youtube.com/watch?v=-ZhvBkrq6rU

&feature=related

議題討論：1.假設有一批外星人訪問地球，你認為他們會是良善的或是邪惡的？哪一種可能性較高？為什麼？

2.在不確定外星人意向的情況下，你認為地球人應該如何應對較為安全？（請完成次頁之九宮格後再回答；該九宮格為賽局理論工具，可以助你做決策。）

Game Theory in A Beautiful Mind (2001):http://www.youtube.com/watch?v=l0ywiYboCLk

外星人是善良的

外星人是邪惡的

外星人不善不惡，但會自我防衛

絕不主動攻擊，但受到攻擊會積極反擊遭受攻擊盡可能不反擊，保持極大克制當發覺他們有不良意圖時，先發制人