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:
“The child who enters life comes not with knowledge or intent,
So those who enter death must go as little children sent.
Nothing is known. But I believe that God is overhead;
And as life is to the living, so death is to the dead.”
—Mary Mapes Dodge (1831–1905)
“if thou slip thy troth and do not come at all.
As minutes in the clock do strike so call for death I shall:
To please both thy false heart, and rid myself from woe,
That rather had to die in troth than live forsaken so.”
—Unknown. The Lady Prayeth the Return of Her Lover Abiding on the Seas (l. 19–22)
“Nothing is a matter of life and death except life and death.”
—Angela Carter (1940–1992)