DNA in living cells, as far as we know, is universal, and combined with Darwin's theory of evolution we have a robust model of how life is, and how it came to be, its origins almost 4bn years ago.
The famous Miller-Urey experiment of 1953, for instance, becomes, not one modest confirmation of a highly conjectural model of how life may have evolved from non-life, but instead proof, as one exhibit at the Field Museum in Chicago put it a few years ago, that "life could begin from chemical reactions between common materials found anywhere on earth".
These patterns are consistent with quantitative genetic models of how relationships between life-history traits should evolve between populations where the environment and patterns of selection differ [32].
Life-course models of how determinants of health across the life-course may affect disease risk have included critical periods, accumulation of risk, and social mobility [ 3].
Back pain researchers could usefully develop hypotheses and models of how risks from different stages of life might interact and influence the onset, persistence and prognosis of back pain throughout the life course.
Along with the Tudor ship being raised in 1982, the remains of 179 of the crew have been recovered - and a handful of skeletons are on display at the Mary Rose museum in Portsmouth, alongside models of how they might have looked in life.
Back pain researchers should develop hypotheses and models of how risks from different stages of life might interact and influence the onset, persistence and prognosis of back pain.
More research needs to focus on factors modifying risk, or related to the resilience or susceptibility to back pain 4. Researchers should develop hypotheses and models of how risks from different stages of life might interact and influence the onset, persistence and prognosis of back pain.
If you were looking for a model of how to suck life out of city streets, this was it.
Because sugar molecules are essential ingredients of DNA and other biological building blocks, the finding will help scientists model how life might have begun.
