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How wolves change rivers!

the extinction of a species affects not only the food chain, but also the geographical image of the Earth

This may be one of the most important conservation concepts to come out of natural science in the last half century.

In a case study George Monbiot tells about the amazing change in Yellow Stone Park in USA after the return of its wolf populations in 1995.

We are used to perceiving wolves as ruthless predators whose survival is associated with eating other animals. It turns out that the presence of the wolves and respectively of all apex preadators in the food chain actually saves lives. And even alters the geography of the area!

Watch this amazing video for more information:

It turns out that we can not always notice the overall change in nature and often we jump to conclusions born from half truths.