https://en.wikipedia.org/wiki/Evolution_of_the_wolf

The evolution of the wolf occurred over a geologic time scale of at least 300 thousand years. ...... The specialized Pleistocene wolves did not contribute to the genetic diversity of modern wolves, and the modern wolf populations across the ...

http://www.bbc.com/earth/story/20160823-the-real-origin-of-north-americas-wolves

Sep 7, 2016 ... "We didn't suspect they would have disappeared, so we were working with the assumption that these should be the descendants of the wolves ...

https://www.macalester.edu/~montgomery/GrayWolfExtra.html

Gray wolves are only one out of billions of different species that live or used to ... America had split from coyotes, and looked very much like they still do today.

https://www.livescience.com/50928-wolf-genome-dog-ancient-ancestor.html

May 21, 2015 ... Greenland dogs also carry some of this ancient wolf DNA, as do the Chinese Shar-Pei and the Finnish spitz, the study authors reported.

http://www.naturalworlds.org/wolf/history/evolution.htm

Some species of this genus, such as the modern grey wolf, have only come ... distribution than it does today, but retreated to the southeastern portion of the ...

http://www.wolfcountry.net/information/WolfOrigins.html

The Evolutionary history of the wolf is not totaly clear, but many biologists ... Scientists do not know if this is the case; however, they continue to search for the  ...

https://www.nationalgeographic.com/animals/mammals/g/gray-wolf/

Learn why wolves let out their spine-tingling howls. ... They do attack domestic animals, and countless wolves have been shot, trapped, and poisoned because  ...

http://wolfpark.org/animals/info/wolves/

Wolves urinate on, or mark, things they regard as their property (such as food) and want to come back to later.

https://www.theverge.com/2017/7/18/15992572/dog-genetics-archaeology-fossils-evolution-domestication-wolves

Jul 18, 2017 ... Did humans domesticate dogs once, or twice? ... Our furry friends likely evolved from a population of wolves domesticated sometime between ...

https://www.smithsonianmag.com/science-nature/how-wolves-really-became-dogs-180970014/

Aug 15, 2018 ... We'll never know the gritty details of how humans and dogs first began to come together. But beyond the theater the true story is slowly taking ...