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Content with tag aging .

Birds' feathers also go grey with the age

A study from the Ecological Pyrenean Institute (IPE-CSIC) and the Doñana Biological Station shows that some birds’ feathers turn white with the age.
? The study was carried out in natural conditions. The team monitored the birds since their birth to an advanced age.

Dispersal capacity explains the evolution of lifespan variability

The evolutionary explanation for lifespan variation is still based on the antagonistic pleiotropy hypothesis, which has been challenged by several studies. Alternative models assume the existence of genes that favor aging and group benefits at the expense of reductions in individual lifespans. Here a new model is proposed without making such assumptions.