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New Foal "Mac" is Latest Budweiser Clydesdale

The baby horse will be trained in the ways of the iconic animals.

It's a boy! The Budweiser Clydesales have added to their famous club a new foal named Mac, born yesterday at 1:20 a.m.

According to a statement released by Anheuser-Busch, brewers of Budweiser, Mac will live on Warm Springs Ranch in Boonville Mo., where he will learn the ropes of being part of a group of draft horses known worldwide.

Horses, Humans Share Facial Expressions: Photos

The company says Mac was given his name because the Clydesdales are the most "macro" of icons.

The Clydesdales, a herd that numbers more than 160, first appeared in 1933, when they were formed as a gift to August Anheuser Busch from his sons to celebrate the repeal of prohibition.

Mac is the first new Clydesdale addition of 2016, and who can doubt there's a Super Bowl commercial appearance somewhere in his future?

Descendants of the world's last known wild horses are remarkably different from domesticated horses, with a new genetic study showing that the two groups went their separate evolutionary ways 45,000 years ago. The existent horses with true wild ancestry, Przewalski's (pronounced shuh-VAL-skee's) horses, even have a different number of chromosomes, according to the study that is published in Current Biology. The research found that genes involved in metabolism, cardiac disorders, muscle contraction, reproduction, behavior and signaling pathways differ between

Przewalski's horses

and domesticated horses. All of these differences would tend to support that Przewalski's horses represent an entirely unique species, but because these mammals can produce fertile offspring after mating with domesticated horses, they are considered as a different population, but not as a different species. Animal experts have debated the issue for years. "The debate comes from the fact that first, Przewalski's horses do not look like domestic horses," senior author Ludovic Orlando of the University of Copenhagen's Natural History Museum of Denmark told Discovery News. He continued, "They have a dun coat color (no fancy colors, for instance), they are quite stockily built, their face looks more robust, and they are rather aggressive. They have never been successfully domesticated, perhaps in relation with their strong temper."

Photos: Horses, Humans Share Facial Expressions

For the study, lead author Clio Der Sarkissian, Orlando and their team sequenced the complete genomes of 11 Przewalski's horses, including all of the founding lineages and five historical, museum specimens dating back more than a century. They then compared the results to the genomes of 28 domesticated horses.

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Przewalski's horses, like this one, only number 2000 now. Like wolves versus dogs, these horses remained wild while others were changed by domestication. "Przewalski's horses were not known outside of Mongolia prior to their discovery during the expeditions of

Colonel Przhevalsky

(a Russian explorer) in the 1870s and 1880s," Orlando said. "Following their discovery, Przewalski's horses became of considerable interest for zoos, and many expeditions were mounted to catch those animals." Unfortunately, many of the horses did not survive the arduous journeys, and some were killed in zoos that were bombed during subsequent wars. In Mongolia, hunting, habitat degradation and other problems eventually led to the horse's extinction there. A captive stock of just 12 to 15 founders has resulted in the population of 2000 now, which Orlando believes "is a true success story for conservation."

Racehorses Are Getting Faster, Data Show

Horses have always fascinated humans, as shown by cave art such as this, found at Lascaux, France. It dates to about 17,300 years ago, long before evidence of the first domestication of horses starts to appear in the fossil record. "The earliest evidence of horse domestication gets back to 5,500 years ago, at

Botai, Kazakhstan

, where archaeologists such as Alan Outram have excavated evidence of early horse harnessing, milking and morphological changes," Orlando said. "This is most often taken as the earliest evidence of horse domestication." He added that at Botai, 99 percent of the animal remains found in bone assemblages come from horses. "Clearly, humans were eating them at the very least, so meat was an early motivation," he explained. "Then, of course, there is evidence for harnessing. Much later, horses will be used for pulling war chariots, (for the) cavalry, and in farming for pulling ploughs."

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Przewalski's horses such as these were reintroduced to what are now reserves. While they are fenced off, the spaces are usually vast and there is very little interaction between horses and humans. Claudia Feh, who took this photo, said, "I've always been interested in free-living horses, and the Przewalski is the world's last truly wild horse." She reintroduced a small herd of the horses to Mongolia in 2004. The horses must fend for themselves, grazing on their own and dealing with rodents, snakes and other animals that exist in their habitat.

Photos: Strange Animals Reveal the Bizarre Past of Horses

The common ancestor of Przewalski's horses, such as this one, and domesticated horses remains a mystery for now. Cave art suggests that there were other, more fanciful early horse species, such as muscular horses with multiple spots. These depictions and others strongly suggest that coat variation happened long before humans began selectively breeding horses for particular coat colors and patterns. Many of the early horses died out, however. For example, researchers working last year in Central Siberia found evidence for a population of wild horses that lived in the region from about 16,000 to 43,000 years ago. Those horses are now extinct.

Horses Communicate With Their Eyes and Ears

Mustangs

(shown here) are often referred to as wild horses, but since they are descended from once-domesticated horses, they are technically feral and not wild. Nevertheless, mustangs can roam free in certain parts of the United States. In 1971, the U.S. Congress recognized that mustangs and free-roaming burros "are living symbols of the historic and pioneer spirit of the West, which continue to contribute to the diversity of life forms within the Nation and enrich the lives of the American people."

All horses are extremely social and intelligent animals that may form lifelong bonds with others. In the wild, Orlando said, "They live in permanent family groups (called harems), dominated by one adult stallion, and including a number of mares and their offspring." "Bachelor stallions, and old stallions can form bachelor groups," he added. "The dominant stallion in a group herds and defends his group. They are, compared to domestic horses, more aggressive, as they have never been domesticated."

Video: Want to Win at Polo? Ride a Cloned Horse

Foals are always a good sign that reserve populations are on the upswing, but even when breeding does happen, there can be long-lasting problems. Orlando said that it is almost impossible to avoid inbreeding, such that researchers work to prevent mating between horse parents and the older offspring of these animals. Conservationists are also trying to limit the influence of domestic ancestry that has already entered into the Przewalski horse population. The latest research offers hope, though. "Now that we have whole genomes," Orlando explained, "we can quantify which genes have accumulated deleterious mutations and can try to favor lineages devoid of such mutations."

Horses Never Forget Human Friends

Greger Larson, who is director of Oxford University's Paleogenomics & Bio-Archaeology Research Network, told Discovery News that the study "shows what you can do when you harness the power of full genome sequences." Next, Orlando and his colleagues, along with other research teams, hope to conduct additional DNA studies to reconstruct the gene pool of horses and other animals just prior to their domestication.

Prehistoric-Looking Horses Roaming China's Plains Again