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Re: DINOSAUR CANCER
On Tue, 23 Jan 1996 firstname.lastname@example.org wrote:
> Cancer may have killed dinosaurs, scientist says
> LONDON, Jan 11 (Reuter) - Cancer caused by particles thrown out by dying
> stars may have killed off dinosaurs 65 million years ago, an American
> said on Thursday.
> Juan Collar of the University of South Carolina believes that sub-atomic
> particles called neutrinos released from stars collapsing in earth's galaxy
> have produced a cancer pandemic among dinosaurs.
> Neutrinos colliding with the nuclei of living atoms could damage DNA,
> nature's genetic building blocks, producing cancer-causing mutations.
> Writing in the New Scientist journal, Collar suggests that a collapsing star
> within 20 light years of earth could produce about 12 malignant cells per
> kilogram (2.2 lb) of living tissue.
> The impact would be greater on larger animals like dinosaurs because they
> have more tissue to become cancerous. Because neutrinos are not halted by the
> outer layers of the body, the cancers are likely to develop in vulnerable
> like bone marrow, Collar said.
> Other scientists have suggested that mass extinctions could be caused by
> cosmic rays from supernova explosions, but Collar says these happen too
> infrequently to explain the disappearance of the dinosaurs.
> Star collapses, when a star caves in under the weight of its own gravity,
> occur within 20 light years of earth about every 100 million years.
...and people say genius is dead!