Tuesday 31 January 2012
Monday 30 January 2012
Sunday 29 January 2012
The Stromatolites Of Shark Bay
Stromatolites — photographed above in Shark Bay, Australia — are fossils that are the earliest record of life on Earth. Stromatotlites are layered structures that form in shallow water over millions in years as sedimentary grains become trapped and cement by micro-organisms.
Saturday 28 January 2012
Friday 27 January 2012
Thursday 26 January 2012
Wednesday 25 January 2012
Tuesday 24 January 2012
Monday 23 January 2012
Sunday 22 January 2012
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