National Geographic is offering 10% off the $99 retail price of a 12 marker yDNA test through September 15th. These tests are part of NG's Genographic Project which is a five year project to map how mankind populated the earth by studying DNA from around the world. Click here to read more about it and order the DNA test. You can also read about it on the FTDNA website at this link. FTDNA has a partnership with National Geographic and is the company that is doing the tests for National Geographic.