Nature is full of evolutionary selflessness. From deep-sea octopuses to certain marsupials, there are animals and insects that reproduce and then die, as their lives can be cut short because they ...

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death follows mating with such consistency that it can be predicted within a ...

Chimney sweeps repeatedly find nests and carcasses of birds and small mammals. Pigeons, blackbirds, and even squirrels often fall into chimneys. Most do not survive the fall. Jackdaws, however, even ...