Honeybees are the only animals besides humans known to have a representational language: they convey to one another the location of food by dancing.
The leathery shelled mammals, which can be found in 10 states throughout the Southeastern U.S., are the only animals besides humans known to carry leprosy.
They act as grazers on the ocean floor (manatees are the only other animals that do this), helping keep a balance under the sea for other creatures to live and breed.
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Up until then in the story, animals were the only things that had been slaughtered.
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When gray wolves were listed under the Endangered Species Act in 1974, Minnesota hosted one of the only remaining populations of the animals in the lower 48 states.
This first experiment, however, had engaged only the animals' spinal cords.
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The bone material is of exceptional quality and one may imagine that the animals died only recently.
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The four kilometers on either side of the border are crisscrossed only by small animals, and the absence of any human activity creates a false sense of calm.
Although deer numbers appeared stable in the area, this was only because thousands of the animals were being pushed out into the surrounding countryside each year.
"The only slaughtering allowed was of those animals already in the abattoirs, " said Mr Billinge.
Some people believe the only viable solution to the trade of wild animals is captive breeding.
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The animals succumbed only when large doses of the mutant virus were introduced directly into their throats.
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Until recently the regulator examined only the effects of the antibiotic residue in animals.
Based on the results of our mapping, we can confirm that the contents of the meatballs follow the IKEA recipe and contain only beef and pork from animals raised in the US and Canada.
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It taps directly into their inherent fascination with the natural world, if only because of the standard array of farm animals: horses, donkeys, sheep, geese and that perennial favourite, the family dog, which keep little hearts thrilled.
Only 35 of the 130 animals remaining are thought to be breeding females.
With a major two-lane highway running through it, Mikumi National Park might be one of the only places in the world to offer views of wild animals and grassy savannahs for the price of a bus ticket.
That may explain why, after the horses were liberated from the Red Army, most of the Lipizzaners were split between the losers, Italy and Austria, while Yugoslavia, which fought with the allies, got only 11 animals.
The only protein known to behave this way in animals is found in the outer membranes of certain nerve cells.
Dr Charles Musyoki, a senior wildlife official, told the BBC that albino animals wre very rare and in the past only an albino zebra had been spotted in a Kenyan park.
While dolphins are among the animal kingdom's most intelligent animals, they are not likely the only math champs.
It is a well known factor that chronic stress can lead to RRBI type behaviors, not only in humans but in other animals, like rats, with the only other requirements currently required for a diagnosis potentially as limited as deficit in ability for back and forth conversation and developing and maintaining peer appropriate friendships.
This may mean a reprieve for hunts like the Eryri in Snowdonia, which claims using dogs is the only effective solution to the problems caused by foxes attacking farm animals.
"We saw more than fivefold artery growth compared with the controls, " which included one group of animals that only got VEGF and another that got the nanofibers without the VEGF.
Full shares his hypothesis with engineers who test the biological principles on their robots, they are often able to offer biologists new insights into the ways in which animals move, resulting in advancements not only for the field of robotics but for biology, too.
Looking at the brains of these animals, the researchers found that the labelled neurons had not only persisted but also appeared to mature into functionally wired neurons.
The new drug has only been tested in animals, but generally trials on tweaked medicines can be done quickly.
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