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Dutch Scientists Create a Chicken-Rabbit Hybrid by Splicing Embryos

In a groundbreaking experiment, researchers from the University of Utrecht in the Netherlands have engineered a new kind of animal by crossing the embryonic cells of a chicken and a rabbit.

The result is a chimera, a hybrid organism with mixed traits from both species, that has the potential to inspire novel applications in agriculture, medicine, and biology.

The researchers used a technique called gastrulation, which involves manipulating the early development of embryos to control the fate of their cells. By injecting rabbit cells into a certain region of the blastoderm, the germinal disc that forms the embryo in chickens, the team could induce the formation of a chimera with a head and body of a bird and limbs and skin of a rabbit.

The trick was to time the injection precisely so that the cells could integrate and coexist without being rejected by the host embryo.The resulting embryos were transplanted into surrogate hens and allowed to develop until hatching, which yielded several viable offspring with hybrid features.

The hybrid chickens had long ears and whiskers, traits that are not found in normal chickens, as well as longer hind legs and a more slender body. However, they still had wings, feathers, and a beak, and could chirp and peck like any other chick.

The scientists believe that their creation holds promise for various fields of research, including animal development, genetic modification, and human disease models. For example, by introducing specific genes from rabbits or other animals into chickens, researchers could improve the quality of their meat or eggs, or produce valuable biologics such as antibodies or vaccines.

Moreover, by studying how different cells interact and differentiate in a chimera, researchers could gain insights into how complex tissues and organs form in a developing embryo, which could lead to new regenerative therapies or cancer treatments.

The experiment has sparked both curiosity and controversy among the public and the scientific community. Some view it as a fascinating demonstration of the power of genetic engineering and the potential of stem cells to differentiate into diverse cell types.

Others raise ethical concerns about the creation of unnatural hybrid animals, the impact on animal welfare, and the implications for the food chain and the environment. The researchers say that they followed strict ethical guidelines and regulatory requirements, and that their aim was not to create a freak show but to explore the limits and possibilities of life.

The chicken-rabbit chimera may not be the first hybrid to be made, but it certainly is one of the most unusual and intriguing. Who knows what other hybrids might emerge from the minds and hands of enterprising scientists in the future? Perhaps a batsquirrel or a fiddlereel? For now, the chicken-rabbit is the talk of the town, and the egg that hatched it is a new milestone in the history of genetic engineering.

OH! And happy April Fools Day!

April 1, 2023

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