Science & technology

Hitch-hiking parasites

|MONTPELLIER

ONE of the main difficulties with adopting a parasitic lifestyle is getting yourself (or your progeny) from one host to another. This is hard enough even if all you need to do is move between individuals of the same species. But if you must leap between individuals of different species—and many parasites are obliged to do just that—then the whole business becomes very awkward.

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