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Why have we domesticated some animals but not others? It comes down to four F's.

An entertaining video explains why we can't ride zebras or breed "war bears."

Photo credit: Canva

Horses were domesticated over 5,000 years ago. Zebras, never.

Humans have domesticated several kinds of animals over the millennia, from trusty horses and mules to livestock for milk and meat to our favorite furry companions. But why those specific animals and not others? What is it that led us to those particular choices? Why can we ride horses but not zebras? Why don't we purposefully breed "war bears" to fight for us?

That last question comes straight from the always-interesting and often-hilarious CGP Grey, whose YouTube videos explore all kinds of things we wonder about but don't necessarily take the time to research. In the video "Why Some Animals Can't Be Domesticated," Grey explains the four main elements that make an animal a good candidate for domestication, which excludes bears (and many others) from the list.

Grey alliterated the four elements to make them easier to remember: Friendly, Feedable, Fecund, and Family-Friendly. Let's dig into what those mean.

 

  - YouTube  www.youtube.com  

 

Domestication requirement #1: Friendly

This one is fairly self-explanatory, but basically an animal has to not post an inherent, immediate threat. We have to be able to catch them if we're going to domesticate them, so that eliminates all of the "carnivores whose day job is murder" as Grey puts it, as well as the large, nervous prey animals that are too afraid of us to let us get anywhere near them.

 wild animals, domesticated animals, gazelle Good luck trying to catch a gazelle.Photo credit: Canva

Domestication requirement #2: Feedable

Every animals is feedable, of course, but that doesn't mean it's easy or cheap to feed them, especially in large numbers. This category pretty much eliminates pure carnivores and some omnivores, leaving mostly herbivores (and some unpicky omnivores) that are easy and cheap to feed. And that aren't dangerous (see #1).

 wild animals, domesticated animals, chickens, chicken feed Chickens will eat just about anything.Photo credit: Canva

Domestication requirement #3: Fecund

This requirement is all about breeding and babies. Some animals are extremely slow to breed, like pandas and elephants, making them undesirable candidates for domestication. Animals that have mate frequently and have relatively short gestation times and/or large litters are more suited to domesticated life. They also need to grow up quickly, which also takes elephants out of the pool.

However, as Grey points out, humans can still tame other animals like elephants. But taming is not the same as domesticating. The basic rule is: If it's on a farm, it's domesticated. If it's in a circus, it's tamed.

Domestication requirement #4: Family-friendly

This is where the horses and zebras question comes in. Horses were domesticated in Eurasia, but if humans started in Africa, why weren't zebras domesticated first? Grey explains that while horses tend to live in hierarchical herds, zebra are more independent with no family structure. Humans can capture the lead male horse and get the rest of the herd to fall in line. Zebra herds are more of a free-for-all and they're kind of jerks to even one another.

 horses, zebras, domesticated animals, wild animals There's actually a big difference between horses and zebras besides just the stripes.Photo credit: Canva

Barnyard animals have inherent family structures that humans have figured out how to fit into. These animals learn to see the humans who own them as a lead cow or top chicken or whatever.

Way back in the hunter-gatherer age, when humans were just figuring out animal domestication, animals had to have all four of these requirements. Today, we have the ability and technology to domesticate more animals if we want to, but we also have less of a need to. Some breeds of foxes have recently been domesticated, bred to be friendly with humans. How fun would it be to have a pet fox?

  - YouTube  www.youtube.com  

 

Technically, a lot more animals could be domesticated if people really wanted to put in multiple human lifetimes of time and effort, but why?

You can follow CGP Grey on YouTube for more fun and informative videos.

This article originally appeared in April.

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Willie Nelson saved the lives of 70 horses and gave them a place to roam on his farm.

Country music legend Willie Nelson has a 700 acre ranch in Texas called Luck, and the name is no misnomer, especially for the 70 horses who live there.

They get hand-fed twice a day and have a wide expanse of farm land to roam around on. But most importantly, almost all of them were rescued from slaughterhouses.

Nelson's horse rescue mission has been ongoing over the last several years, and is actually a large part of why he named his property Luck Ranch in the first place.  

"When you’re here, you're in Luck, and when you're not, you're out of Luck,"  Nelson told ABC KSAT 12. 

[rebelmouse-image 19534854 dam="1" original_size="700x284" caption="Photo via KSAT/YouTube." expand=1]Photo via KSAT/YouTube.

Horses are much more than a staple of his farm life — they're featured in his music as well. Nelson recently wrote a song about his beautiful rescue horses called "Ride Me Back Home" which will appear on his album that drops this summer. The 87-year-old singer-songwriter spends roughly 200 day stretches on the road touring, so it makes sense he'd be longing for the more laid back life on the ranch with his beloved equines.

Rescuing horses isn't the only sort of on-the-ground philanthropy Nelson's dedicated to though. He also supports struggling American farmers via a nonprofit he co-founded called Farm Aid.

For over 30 years, Farm Aid has been dedicated to building "a system of agriculture that values family farmers, good food, soil and water, and strong communities," as the website states.

Farm Aid also holds annual food and music festivals where some of the biggest names in country music come together to raise money for farmers, and show appreciation for all that they do for this country.

[rebelmouse-image 19534855 dam="1" original_size="700x467" caption="Photo by Scott Streble/Farm Aid." expand=1]Photo by Scott Streble/Farm Aid.

Celebrities and public figures often give money to support causes they care about, but when they get out there and actually make giving back a part of their lives, it's particularly inspiring.

If you're interested in helping Nelson help promote family farmers and the good food movement, there are many ways to get involved. If offering aid to horses that need to be rescued and rehabilitated speaks to you more, Habitat for Horses is a great place to start.

You don't have to be famous or have a lot of money to make an impact. All that's needed is a little effort and drive to make the world a better, more humane, and healthier place to be.

Watch Nelson's whole interview with KSAT here:

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See gorgeous photos of the ranch this couple donated to help people with PTSD.

When one of his horses crashed into him without warning, Rick Wanless had no idea how badly he was hurt.

Wanless, who is in his late 70s, was working on his ranch in British Columbia four years ago when the collision happened. It didn't seem so bad at first, but the pain was intense. He had broken his pelvis and suffered severe internal injuries.

A team of paramedics rushed him to a local hospital. From there, he was transported by medevac to a trauma center in Vancouver.

Luckily, Wanless made a full recovery. And today he's riding horses again without fear, something he's loved doing his entire life. He credits those amazing first responders with making that possible.

Wanless and his wife, Donna, decided there had to be a way for them to give back.

Rick and Donna. All photos by Rick Wanless, used with permission

"I realized that they have a pretty demanding job and a great many of them have PTSD (post traumatic stress disorder)," he said. "The need to help them seems to be overlooked when they're so busy helping us."

So he started reading. And as he read, he found dozens and dozens of articles praising the therapeutic value of farms and ranches. And it's true, studies have shown that exposure to nature can be great at easing the symptoms of PTSD, which include intense fear, anxiety, insomnia, and many others.

As he read, Wanless looked around the serene, 25-acre ranch he and his wife call home and came to a big realization.

It was the perfect place for healing.

Rick and Donna offered up their ranch to Honour House, an organization that provides free housing and support to Canadian veterans and people who have served who have PTSD.

When most people want to give back, they donate money. Rick and Donna decided instead to open up their home to people in need — to share their little slice of nature with people who desperately need to get away from the triggers and stresses of everyday life.

"I imagine a lot of people leave stuff in their wills, but they never know if it comes to fruition or not," he said. "This is actually something we can see happening."

The property will be called Honour Ranch, and small numbers of individuals suffering from PTSD will be able to visit and work with the horses...

...watch for deer, bears, and other wildlife...

...boat or kayak on the pond or nearby river...

...or just camp out and enjoy the tranquility.

Rick and Donna will continue to live on the ranch, but they won't have a great deal of interaction with their guests. And that's the point.

He said they have virtually no neighbors, making the property a perfect place to be alone in nature.

Of course, rest and recuperation is only one aspect of recovery. Honour House will bring in treatment professionals as needed to work with visitors to the ranch. The program is expected to kick off in Spring 2017.

In the meantime, Rick and Donna just hope their kindness will inspire others.

"We've had a wonderful life. We haven't had any hardships," he said. "If [others like us] can be inspired by what we're doing and want to help out in some way in their community, that would be wonderful."

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Compton used to be filled with cowboys. See how one mom brought them back.

When you think of Compton, California, a few things come to mind.

You might think of rap legends N.W.A. and their three-time-platinum album "Straight Outta Compton" or the Los Angeles suburb's history of violent crime and gang wars in the 1990s.

But odds are, you don't think of cowboys. Until now.

Ivory McCloud and his friend Mike Jones ride along a path under power lines in Compton. Photo by Richard Vogel/Associated Press.

Before Compton was anything, it was a cowboy town. And for many residents, it still is.

The city has undergone multiple transformations since its incorporation in 1888. It's been majority white and majority black, and now the population is majority Hispanic. But the horses have remained a constant.

"My dad was a cowboy. I'm a cowboy. I grew up in Compton. I live in Compton," horse trainer Ivory McCloud told the Associated Press.

McCloud and Jones ride down a street in Compton. Photo by Richard Vogel/Associated Press.  

Richland Farms, one of Compton's four neighborhoods, is zoned for agriculture and always has been. In fact, when Rev. Griffith D. Compton donated land to create the city in the 1880s, he specified that Richland Farms be used that way. 

Today, the backyards in this semi-rural section of Compton are still large enough to keep horses and other livestock.

"In our neighborhood, there's about 400 homes, a couple hundred horses, and some goats and cows and chickens," Richland Farms resident Mayisha Akbar told the Associated Press.

Akbar moved her family to Compton more than 30 years ago, namely so her kids would have room to ride horses.

She grew up taking care of animals in Harbor City, another semi-rural town about 10 minutes south of Compton. As an adult, she was raising her family in Torrance, California, and working as a real estate agent when she came across Richland Farms and never looked back.

"I was looking for property for an investor and came to Compton ... and thought it would be a wonderful place to raise my own kids, so we moved over," she said. "But then [I] realized that the community was much different from where we had come from."

Mayisha Akbar greets a horse at the Compton Jr. Posse facility. Photo by Richard Vogel/Associated Press.

Just as her family arrived, Compton took a turn for the worse. Gang and drug violence reached its peak. Parents and grandparents in her community were desperate to offer their kids safety and support. Akbar invited many of the children over to her house and started teaching them about horses to keep them busy and out of trouble.

As word spread about the project, many suggested Akbar officially form a nonprofit so she could accept donations to keep the good going. In 1988, the Compton Jr. Posse was born.

For nearly 30 years, the Compton Jr. Posse has served this diverse community.

Through the organization's year-round programs, kids learn about riding, equine science, nature, and the outdoors. They even get involved in community service. The programs are available on a sliding scale, and Compton Jr. Posse has served thousands of kids in its 28-year history. This summer alone, more than 300 kids attended sessions!

Photo by Richard Vogel/Associated Press.

The young riders groom and care for the horses.

Adrina Player, 9, places a lead on a horse. Photo by Richard Vogel/Associated Press.

They clean out and manage the stalls.

Photo by Richard Vogel/Associated Press.

They prepare their minds and bodies for the work ahead.

Kids exercise prior to riding horses at the Compton Jr. Posse Youth Equestrian Program. Photo by Richard Vogel/Associated Press.

And get to work learning the ins and outs of this challenging, competitive sport.

Photo courtesy of Compton Jr. Posse/Facebook.

There are also opportunities for students to participate in competitions and put their science knowledge and new skills to use for their community and country.

Compton Jr. Posse participants have advocated for equal access to the outdoors in Sacramento and represented the U.S. at the World Ranger Congress in Arusha, Tanzania and the International Conference of Outdoor Interpretation in South Korea. Jr. Posse riders have competed in countless regional and national competitions.

"Part of what happens when you are in a program like this, especially competing in horse shows, is that it takes you into communities that don't look like your own community," Akbar said. "So the people that we engage and develop relationships with are people that can help them with their future careers and help them go to college."

Nathan Allan Williams Bonner riding Cuba in a competition. Photo courtesy of Compton Jr. Posse/Facebook.

That's right, Compton Jr. Posse continues to support students after graduation.

22 CJP alumni are enrolled in college this semester. Each semester they stay in school, they're eligible to earn a scholarship from the organization. Many also return to Compton Jr. Posse during summer breaks to teach the next generation of riders.

"We encourage them to come back and pay it forward," Akbar said. "Last summer we hired 26 of our alumni students to come back and work our school camps."

Photo courtesy of Compton Jr. Posse/Facebook.

The cowboys (and cowgirls) of Compton are remarkable young people carrying on the tradition of their city's deep agricultural roots.

The lessons they learn and skills they build with the Compton Jr. Posse (like patience, persistence, confidence, and trust) will carry them to bold, bright futures. Possibly on horseback.

"They're just kids," Akbar said. "They want to belong. They want better for themselves and their families. Our program has opened their eyes to possibilities."

Photo courtesy of Compton Jr. Posse/Facebook.

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