Three Decades After Dolly: the Evolution of Cloning Today
WHO:
Phys.org - Dolly the sheep was the first cloned mammal.
The Conversation - Barbra Streisand had her dog Samantha cloned into two new puppies.
WHAT:
Phys.org - Dolly's birth sparked predictions of cloned pets, humans, and resurrected extinct animals.
The Conversation - Cloning is used to understand diseases, support conservation, and develop new life manipulation approaches.
The Conversation - Cloning requires specialized equipment, donor cells, egg cells, and surrogate pregnancies, making it expensive and difficult to scale.
The Conversation - It took 277 attempts to successfully clone Dolly.
The Conversation - In 2024, researchers in China cloned a rhesus monkey.
The Conversation - In 2020, scientists cloned a black-footed ferret to increase genetic diversity.
WHERE:
The Conversation - Cloning is commercially available for pets in countries such as China and the United States.
The Conversation - The black-footed ferret cloning project aimed to address severe population decline in the US.
WHEN:
The Conversation - Dolly the sheep was born 30 years ago.
The Conversation - The cloning of a rhesus monkey occurred in 2024.
The Conversation - The cloning of a black-footed ferret took place in 2020.
WHY:
The Conversation - Cloning is used to restore populations of endangered species and increase genetic diversity.
The Conversation - Ethical concerns have been raised regarding animal welfare in cloning experiments.
HOW:
The Conversation - Cloning is primarily done using somatic cell nuclear transfer, where a non-reproductive cell's nucleus is inserted into an egg cell.
The Conversation - The process of cloning involves epigenetic reprogramming, where the egg cell resets chemical instructions that control gene expression.
(UPDATED July 8, 2026 17:29 UTC)
Cloning has made significant strides since Dolly the sheep became the first cloned mammal, sparking a wave of interest in cloning pets and even endangered species. Notably, Barbra Streisand had her dog Samantha cloned into two new puppies, highlighting the commercial availability of cloning in countries like China and the United States. While cloning is used for various purposes, including conservation and disease research, it remains a complex and costly process that raises ethical concerns regarding animal welfare.