Death
On 14 February 2003, Dolly was euthanised because she had a progressive lung disease and severe arthritis. A Finn Dorset such as Dolly has a life expectancy of around 11 to 12 years, but Dolly lived to be only six years of age. A post-mortem examination showed she had a form of lung cancer called Jaagsiekte, which is a fairly common disease of sheep and is caused by the retrovirus JSRV. Roslin scientists stated that they did not think there was a connection with Dolly being a clone, and that other sheep in the same flock had died of the same disease. Such lung diseases are a particular danger for sheep kept indoors, and Dolly had to sleep inside for security reasons.
Some have speculated that a contributing factor to Dolly's death was that she could have been born with a genetic age of six years, the same age as the sheep from which she was cloned. One basis for this idea was the finding that Dolly's telomeres were short, which is typically a result of the ageing process. The Roslin Institute have stated that intensive health screening did not reveal any abnormalities in Dolly that could have come from advanced aging.
Read more about this topic: Dolly (sheep)
Famous quotes containing the word death:
“One short sleep past, we wake eternally,
And Death shall be no more; Death, thou shalt die!”
—John Donne (c. 1572–1631)
“But, when nothing subsists from a distant past, after the death of others, after the destruction of objects, only the senses of smell and taste, weaker but more enduring, more intangible, more persistent, more faithful, continue for a long time, like souls, to remember, to wait, to hope, on the ruins of all the rest, to bring without flinching, on their nearly impalpable droplet, the immense edifice of memory.”
—Marcel Proust (1871–1922)
“I thought of all that worked dark pits
Of war, and died
Digging the rock where Death reputes
Peace lies indeed.”
—Wilfred Owen (1893–1918)