Microbiology?

beefzoologistΒιοτεχνολογία

21 Φεβ 2013 (πριν από 4 χρόνια και 5 μήνες)

146 εμφανίσεις

Martin Fisk

College of Oceanic and Atmospheric Sciences

Oregon State University

Corvallis, Oregon


Astrobiology
-

the study of the origin, evolution,

and distribution of life in the Universe

The Ultimate Questions:


How did life start?

Is there life elsewhere?

Are we alone?


And why is astrobiology relevant to workshop

on microbial oceanography?

EARTH 2008

MBARI/C
-
MORE/ASTEP

Microbial Oceanography Workshop

July 20
-

25, 2008

Microorganisms live in extreme environments


hot


cold


acid


no oxygen


no light


high salt


very dry


starvation diet


live by consuming chemicals

Some marine microbial habitats


hot


cold


acid


no oxygen


no light


salty


low food supply


but plenty of chemical food

Why Oceanography and Why

Microbiology?

Marine geology

Volcanoes and volcanic rocks in the oceans

Why Oceanography

Video footage from the movie "Pele Meets the Sea" courtesy of Richard Pyle

ALH84001

EETA79001

Nakhla

Shergotty

Images from

NASA

Nakhla

Nakhla

Observations in a

Martian Meteorite

20
m
m

Why Teachers?


Integrated science instruction


instilling wonderment


physics


chemistry


astronomy


biology


microbiology


oceanography


geology


math


sociology


Reference: J. T. Staley (2003) Astrobiology, the transcendent
science: the promise of astrobiology as an integrative approach
for science and engineering education and research,
Current
Opinion in Biotechnology

14
:347
-
354.

NASA Solar System Exploration, Planets

http://solarsystem.nasa.gov/planets/index.cfm

300,000,000,000 stars

Artist’s image of the Milky Way Galaxy

Image source unknown

http://www.fas.org/irp/imint/docs/rst/Front/tofc.html

http://www.fas.org/irp/imint/docs/rst/Front/tofc.html

What do you think is the probability of life in our

galaxy other than on Earth?


Probability of rolling a 6 on a die twice in a row:

Equals the probability of the first number being a 6

times the probability that the second number is a 6.

1/6 x 1/6 = 1/36


What we need to know to answer the question.

(1) The number of stars in our galaxy. (300 billion)

(2) Probability that a star has planets. (guess 1/100)

(3) Number of planets in the habitable zone. (guess 1/10)

(4) Probability that life develops on habitable planets (guess
1/1,000,000)


Number of planets with life = 300 billion x 1/100 x 1/10 x
1/1,000,000 = 300.

www.ta3.sk/docasne/ ESTW/08_extrasolar.html