Toy choice among young children is the Big Kahuna of sex differences, one of the largest across the life span.
Accordingly, mutations of genes in this pathway will have the largest effect on life span.
There are large differences in life span between some species of animals.
Repeated mild heat-shocks throughout life have a larger effect on life span than does a single heat-shock early in life.
On a larger scale, the life span of leaves is an important variable in comparing stand-level productivity, nutrient cycling and decomposition between evergreen and deciduous forests (e.g., Bray and Gorham [1964]; Gosz [1981]; Vogt et al. [1987]; Sprugel [1989]; Gower and Richards [1990]).
In subsequent experiments, we used 200 μM rapamycin, which produced the largest increase in median life span.
The largest change in mean life span was for mictic IF mothers, from 8.0 days under AL conditions to 14.6 days under IF an increase of 83%.
Generally, the larger the animal, the greater is its life span, so crocodiles, large snakes (such as boas and pythons), and large lizards often live more than 20 years.
Cluster analysis identified eight groups of snakes, similar in terms of risk factors, with high risk species sharing characteristics such as large body size, long life span, limited habitat breadth, and a high anthropogenic threat ranking.
Nevertheless, the large variation in maximum life span among mammal species is strongly correlated with rates of senescence in survival [16], justifying its widespread use in comparative studies.
