Archivo para junio 2007

Journey of Mankind

5 junio 2007

Here is a nice educational tool for all ages. The Bradshaw Foundation , an archeological web site, has set up a nice animation that tracks human kind expansion, from 160.000 to 8.000 years ago:

They base their tracking on the analysis of Mitochondrial DNA for men, and of the Y Chromosome for women, found on human fossils all around the globe, and on Radio Carbon dating of them.


Captcha for educated people

4 junio 2007

You’ll need a bit of math to register in that russian (or near) web:

but it’s not that hard, just remember that -1 ≤ sin(x) ≤ 1 …

through Microsiervos