Pumping calves? (Ancestors: The Humankind Odyssey)

In General decided to still go through the game and to Wiimote all the achievements that normally make it to 2 million BC.

At some point a long time ran out for meteorites with 2nd calves, as much as 3 stone brought. Unloaded cubs, and oops.. they have 2 mutations from drew. Hike they were born without mutations and then suddenly from small 5 6 been found with mutations.

I just do not understand what caused these mutations.. meteorites, or just the fact that I have a lot of experience was it? Tried the last can carry everywhere, but it nifiga not pumped..

UPD: Understood. If anyone is interested, picking up the meteorite with stupid cubs back when they return and unload(need them to throw in the camp!) get mutations. In the end the second time I generation 12 older mutants in the pack. 8-P