Environment
Different parasitic worms can raise or lower female fertility
Amazonian women have three fewer children if they are infected with hookworms, but those afflicted by roundworms have two more
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Amazonian women have three fewer children if they are infected with hookworms, but those afflicted by roundworms have two more
Far from being climate wreckers, as has been suggested, earthworms may have a complex and subtle effect on the amount of carbon released into the atmosphere