They have a remarkable ability to live through, delay or entirely escape a host of diseases that kill off most of their peers.
In Brazil, cattle ranchers used to nearly kill off the jaguar because it would kill their cows.
But our best hope, it was decided, was to kill off the buccaneers until they either hauled down their flag or ran away with the Hispaniola.
But it's not clear that they'll ever kill off all desktop applications entirely.
This is not the only (and certainly not the most famous) book in recent years to wield the findings of behavioural economics, neuroscience and other embryonic disciplines to kill off homo economicus.
He promised, as every previous President has, to vet the budget "line by line" for waste; he will find it just as hard as his predecessors to kill off programmes with powerful congressional backers.
The insecticide will kill off the insect pests.
One fear is that the increasing acidity will kill off pteropods and similar creatures with calcium-carbonate shells or skeletons.
If so, why don't we just kill off destitute children around the globe instead of giving donations to Oxfam?
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