Schishuney / fishing place with a pole / Waldron Island Dusk o’ June, MMIX Jelte Harnmeijer Center for Astrobiology & Early Earth Evolution University of Washington / National Aeronautical and Space Administration L i f e

- Gratitude in a Word - “Dhanje-bhat”

- Science | Religion, Truth & Method -

- Space, Time & Consciousness -

- Geological Time -

- The Birth of our Home, Earth -

(A) Isua (3.8 Ga) (B) Pilbara (3.5 Ga) (C) Barberton (3.5 Ga) - The Oldest Rocks -

you - And what of Life? -

-Entropy –

- Organization –

- Order –

- Complexity –

dS dt dS is the incremental change in Entropy dt is the incremental change in time  0 -The Second Law of Thermodynamics – “Entropy in the Universe always increases”

Nutrients Waste products Low EntropyHigh Entropy - Life is a Struggle against Entropy –

Low EntropyHigh Entropy Nutrients Waste products - Life is a Struggle against Entropy –

- Death –

- Isotopes – Example: Carbon 12 C 13 C proton neutron ‘ light’ ‘heavy’ Negative δ 13 C = mostly ‘light’ carbon Positive δ 13 C = mostly ‘heavy’ carbon

CO 2 + H 2 O -> O 2 + CH 2 O - Biosynthesis –

- Let’s get back to the rocks! –

- Australia –

- Greenland –

- Carbon Isotopes –

- An Unexpected Surprise –

- Fossils (!) –

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