Researchers in Dubai made news this week by announcing the arrival of the world's first cloned camel, a singular achievement in a region where top racing camels are prized.
Iran followed two days later with the birth of the country's first cloned goat, though many other cloned goats have been born elsewhere.
Most cloned mammals now lead regular lives, but as recently as 10 years ago they often died young of lung malformations, a problem that appears to have been largely overcome. Healthy cloned dogs and cats are the most recent significant achievements.
Many researchers are getting closer and closer to human cloning by trying to clone monkeys.
Unfortunately, or perhaps fortunately, all attempts at cloning monkeys from adult donor cells have failed, with one researcher deeming the resulting embryos "a gallery of horrors." (Splitting newly formed regular monkey embryos does work, but that can be seen as just inducing natural twins.)
The following is a list of significant animal species cloned from adult cells, in chronological order — plus one that's even more remarkable.
Frog: The first amphibians cloned from adult cells were made in 1962 by John Gurdon, a British biologist at Cambridge University. His experiments showed that cloning adults was theoretically possible (clones made from embryonic cells had been created a decade earlier).
But his tadpoles didn't survive to full adulthood, and it wasn't until years later that he was able to get cloned frogs that lived full lives.
Carp: Way back in 1963, a Chinese researcher named Tong Dizhou apparently created the world's first cloned fish when he transferred the genetic material from an adult male Asian carp into a carp egg, which developed and was born normally, and even sired children.
But since his work took place behind the "Bamboo Curtain" at the height of the Cold War, Tong's achievements went unheralded in the West. He died in 1979.
Sheep: The famous Dolly was born on July 5, 1996, in Edinburgh, Scotland, the first known mammal of any species to be cloned from an adult donor. She was the only one of 277 cloned embryos to survive.
She quickly became a media sensation, yet went on to live a short but quiet life, bearing six lambs naturally. Cloned cattle, genetically similar to sheep, followed within the next year.
In February 2003, suffering from a virus-borne form of lung cancer common among sheep, Dolly was put to sleep. Some experts wondered whether she was already "old" at birth, due to her genes coming from an adult animal, but her creators disputed that.
Goat: The world's first cloned goat was born on June 16, 2000, the result of work by scientists at Northwest University of Agriculture and Forestry Science and Technology in Xi'an, China. Unfortunately, the kid, nicknamed "Yuanyuan," died after a day and a half from lung defects.
On June 22, 2000, another cloned goat was born in the same facility. Named "Yangyang," she lived at least six years and had kids, grandkids and great-grandkids.
Housecat: CC, or Copy Cat, the world's first cloned domestic cat, was born Dec. 22, 2001 on the campus of Texas A&M University in College Station, Texas. Though she was the clone of a calico, her surrogate mother was a tabby, and CC's coloring was a mixture of the two.
She currently lives in the household of one the scientists who worked to create her and has had naturally conceived kittens of her own.
White-tailed deer: The same Texas A&M team responsible for CC the cloned cat also created the world's first cloned deer, which was born on May 23, 2003. Dubbed "Dewey," he was cloned from a dead buck. Three years later, he became the father of female triplets, who were conceived the old-fashioned way.
Horse: Five days after Dewey, the world's first cloned horse was born in Italy. A female named "Prometea" — presumably after Prometheus, the god who gave man fire in Greek mythology — news reports from the time indicate she was healthy.
Dog: Snuppy, an Afghan hound born April 24, 2005, was the world's first cloned dog. He was created by a team led by Korean genetics researcher Hwang Woo-suk, who also claimed to have cloned human stem cells, later found to be untrue; Snuppy was the sole part of Hwang's work that was untainted.
Snuppy has since fathered 10 puppies through artificial insemination of two cloned female dogs.
Pyrenean ibex: The world's first extinct mammal to be "resurrected" was a subspecies of the more widespread Spanish ibex, or mountain goat. The last known Pyrenean ibex was found dead in early 2000, but tissue samples that had been taken when it was alive led to a joint Spanish-French cloning program.
After hundreds of failed attempts, a live Pyrenean ibex was born in January 2009, for the first time in more than a decade. The surrogate mother was a domestic goat. But the achievement was short-lived; the kid died 9 minutes after birth due to malformed lungs.
Camel: Injaz, the world's first cloned camel, was born April 8, 2009 in Dubai, one of the United Arab Emirates. Her name means "achievement" in Arabic, and she likely won't be the last cloned camel, as camel racing is very popular in the Gulf states and certain animals are prized.
However, Injaz won't ever get to know her older "twin" — the donor animal was slaughtered for its meat in 2005.
And last but far from least:
Fatherless mouse: Japanese researchers went beyond cloning in 2004 to create the world's first fatherless mammal.
The mouse, nicknamed Kaguya, was born in 2004 and was a "parthenote" — she literally had two mommies. Genetic material from two mouse eggs was modified and combined so that one "fertilized" the other.
Kaguya has almost certainly died of old age since, but bore at least one litter of naturally conceived pups.