But critics of this hypothesis point out that most types of skin cancer, specifically the basal-cell and squamous-cell carcinomas that are the commonest varieties of the disease, tend to affect older people (who have already reproduced and are thus, in Darwinian terms, expendable) and are often not lethal anyway.
We found that, without distinguishing marks, it can be difficult to keep track of which notes had already reproduced.
In the first category, numerical dynamos with homogeneous boundary conditions have already reproduced successfully the most fundamental observed geodynamo properties, in particular the dipole dominance of the field (Glatzmaier and Roberts 1997) and its reversibility (Glatzmaier and Roberts 1995).
Nakano et al. (2010) have already reproduced the signature of dual ruptures in a simulation of an earthquake doublet that occurred at a segment boundary of the Sumatran fault, Indonesia.
The reason is that malaria transmission becomes more likely late in the life of mosquitoes after they have already reproduced at least once (see also Koella et al. 2009).
We restricted the sample to include only those individuals who had been successfully followed at least until the age at which 90% of the individuals in the population had already finished reproducing (age 50 for men and 44 for women), for which LRS is known, and who reproduced at least once (739 men and 794 women).
For the probability of reproducing, we restricted our analyses to individuals who survived to age 15 and who had been successfully followed at least until the age at which 90% of the individuals in the population had already finished reproducing, if they were to ever reproduce in their lifetime (age 50 for men and 44 for women).
Wading into a complicated and controversial ethical debate, Mr. Bush said private research had already produced more than 60 genetically diverse stem cell colonies, or lines, that could reproduce themselves indefinitely and be immensely valuable in medical research.
It was a vision of collective Edenic tranquillity, as if the first humans had already managed to reproduce and multiply before they were expelled from the Garden.
This first west differed sharply from the original colonies, which had already begun to reproduce the Old World social and economic patterns, along with their class distinctions.
