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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