I mean, do you see that waggy tail, hear the little whines, feel the snuggles? If you think your dog doesn’t love you, maybe try a different dog.

Kidding, kidding. Of course, we all want to know if those signs of affection are love, the kind that we feel for our fluffy little friends, or just, “This guy gives me food!” Obviously we can’t read a dog’s mind, but according to some promising research, yes, your dog does love you.

In one study, dogs were presented with five smells (their own, a familiar dog’s, an unfamiliar dog’s, a familiar human’s, and an unfamiliar human’s) as their brains were scanned. The area of the brain associated with positive emotional response was most activated by the familiar human scent, which suggests that dogs do love us uniquely.

Keep that in mind the next time they chew up your favorite shoes.

Dolphins have adapted to their environment in the following ways:

• Fin shape: a dolphin's tail goes up and down to help it dive up to get air (compared to a fish's back fin which moves side to side). The shape of their fins also helps to propel them through the water.
• To help dolphins save oxygen while they dive underwater, their heart beats slower during a dive and their blood is diverted from other parts of the body to their heart, lungs, and brain.
• Dolphins also save oxygen via their muscles, which have a protein called myoglobin, which in turn stores oxygen.
• Dolphins have blubber, or fat, which provides insulation, helping the dolphin stay warm in cold water.
• Blubber also serves another function, streamlining the body for better speed in the water.
• Dolphins have a body covering of skin (not scales). The uppermost layer of the skin produces an oil which forms a film that covers the dolphin's whole body.
• Being mammals, dolphins breathe with lungs rather than gills, so they breathe from a blowhole which closes before the dolphin goes into the water, so water will not enter the blowhole.
• The long nose helps the dolphin to kill sharks.
• Dolphins have teeth, which they use to catch fish.
• Dolphins have large brains in relation to the size of their bodies, and studies show they have exceptional intelligence.
• Dolphins work together to find food, often "herding" school of small fish up onto reefs and sandbars. The dolphins then work together, taking turns to feed while the other dolphins keep the fish herded.
• Dolphins have well developed echolocation, by which they locate other animals and objects in the water. It is also how they communicate with each other.
• Dolphins have between 45 and 63 small, sharp teeth, which enable them to tear food into smaller pieces.
• Dolphins sleep with just part of their brain, so that the other part remains constantly on alert for danger.

There just aren’t any more that are worth our time. It’s actually pretty difficult to find species that suit domestication—although there are a few exceptions, they generally need to mature quickly relative to us, be willing to breed in captivity, be able to eat the food we can provide, have a good temperament, recognize humans as their pack leaders, and not flee when they’re scared.

So, although we probably could domesticate some seemingly good candidates, like zebras or deer, they’re better off in the wild.

Animals have different body structures, so they move differently. They have different structures because of MANY years of evolution. Animals living in different areas with different landscapes had to get around differently, so they adapted. And they also had to get food from hard-to-reach places, so they adapted. Like a giraffe has a long neck for tree leaves and a wolf has long legs to chase and catch prey. Monkeys have those flexible limbs for climbing and tails for balance while dwelling in the high trees.

The simple answer is: different body structures.

But the have different body structure because they had to adapt.

Living creatures move differently because they have different body structures. They have longer legs, shorter legs, stronger or weaker muscles that allow them to run faster or jump higher or faster or no legs at all so they have to crawl, and they have longer, shorter, stronger, or weaker arms.

All this as a result of adpating and evolving over thousand or millions of years, or maybe they were designed and created that way. Even with the belief of creation, there is evidence that animals did adapt and change, or there are signs that species that were known have disappeared and new ones exist that were not previously known. Animals are believed to have adapted over time to conform to the requirements of their environment, to be able to get food, and to be able to not be food.

This does not mean animals grew flexible limbs for climbing and tails for balance so they could become monkeys dwelling in the high trees. It means that some animals were born and grew up with genetic mutations that allowed them to live in tree and hide from ground based predators. They had a better chance to survive and propogate than earlier versions of the same animal that were stuck on the ground.

When cats headbutt you, they’re depositing facial pheromones. Vets call this behavior bunting.

“Rather than territorial marking or ‘claiming’ someone, as is commonly thought, cats do this to mark something as safe—sort of like leaving a signal of comfort and safety. So you could think of it as a sign that they are trusting that person or environment,” Dr. Meghan E. Herron, clinical assistant professor of behavioral medicine in the Department of Veterinary Clinical Sciences at Ohio State University, told Vetstreet.

Be the one providing feed and treats for them. Soon they'll get to know you and even trust you.

Always be gentle and calm around them. It helps to talk or hum continually around them so you never surprise them. Stay in their field of vision as much as possible. Let the cows do things at "cow speed" and don't try to rush or harry them.

Some breeds and individual cows have calmer dispositions as an inherited trait, so you may be able to choose a cow that is more likely to trust you.