The balanced ecosystem that maintains the principles of life on our planet turns out to be extremely delicate. Continuously is come developing variations in the environment, in sometimes "call it so" of a mode more or less natural and in others as result direct to it activity human, that despite result barely perceptible to simple view, not leave of have a dramatic impact for the survival of certain species and general for a part of the biodiversity that not always gets assimilate in a time prudential such swaps. Changes to the own environment seeks to compensate in their constant struggle to restore the balance, but sometimes by the "hecatomb" effect of its results, makes it clear that the origin of the events not always allows time for regeneration. This was possibly a priori estimates could result in the extinction of the large reptiles that inhabited the planet. But so even them advances technological of today day we would allow survive to events as the possible collision of a huge meteorite on the surface land. In that case the man would be easily one of the species most exposed to extinction, which would lead to the following reflection, if the case who would the subsequent generation of inhabitants of the planet...? Perhaps the ancient reptiles or amphibians that already proved to be the best adapted...
"Man... that important and scholarly element believed to be, just repair in the vastness of the universe, and even she was able to warn that within it surely may ever come to have knowledge of their existence."