1. The evolution of longevity
Linda Partridge, David Gems 
Current Biology 
Volume 12, Issue 16, Pages R544-R546 (August 2002)
DOI: /S (02)

2. Figure 1
Age-specific mortality rate and reproductive lifespan in wild-type nematode worms (Caenorhabditis elegans, N2 hermaphrodites at 20°C). To measure reproductive lifespan 5 virgin males were added to groups of 10 hermaphrodites of progressively older ages. Hermaphrodites were subsequently maintained individually, and progeny production observed. The left-hand blue axis shows the percentage of hermaphrodites producing more than 10 progeny (N=10 per test age), while the right-hand, red vertical axis shows the percentage of worms that entered each age class that died during it (D. Gems, unpublished).
Current Biology  , R544-R546DOI: ( /S (02) )

3. Figure 2
Insulin/IGF signalling may mediate life history plasticity in response to varying nutrition levels. This scheme presents three scenarios: IIS may directly reduce longevity assurance processes and increase reproduction, or it may promote resource reallocation from longevity assurance processes to reproduction, or it may promote other processes that cause somatic damage.
Current Biology  , R544-R546DOI: ( /S (02) )