Thursday, March 11, 2010

Por que razão os tigres têm listras e os leopardos têm manchas?

[PPT] Turing Patterns in Animal Coat
Why do animals' coats have patterns like spots, or stripes?
Understanding Why Leopards Can't Change Their Spots
«The leopard cannot change its spots, nor can the tiger change its stripes, but a new research report published in the January 2010 issue of the journal Genetics tells us something about how cats end up with their spots and stripes. It demonstrates for the first time that at least three different genes are involved in the emergence of stripes, spots, and other markings on domestic cats.»
Nature's numbers : discovering order and pattern in the universe, Ian Stewart
Why do many flowers have five or eight petals, but very few have six or seven? Why do snowflakes have sixfold symmetry? Why do tigers have stripes but leopards have spots? This book takes the reader on a mathematical sightseeing tour of the natural world.

1 comment:

entanglement68 said...

molto interessante questo articolo, grazie!
anche il libro di Stewart è molto bello..