@Setanta,
JEEZUS H. This kid is getting predictable. The "osteons" are the same as the SUlfate "blueberries" that were seen in the Rover videos. The blueberries are easily seen to be chemical precipitate concretions.
No one at NASA has taken leave of their senses and claimed these things were anything but indicators that there once was water on the planet.
Youre giving this site a whacko reputation by posting this kind of idiocy.