Italy's clam farmers fear blue crab 'invasion'

In the shallow waters of the Scardovari lagoon, fishermen catch clams for Italy's beloved spaghetti alle vongole, alongside mussels and oysters. But an invader risks putting them out of business.

Why does polygamy endure in urban environments?

Experts have long believed that in fast-growing, urban environments, polygamy would disappear. In Bamako, Mali, where the population is nearly 3 million and rapidly growing, and economic incentives to polygamy have faded, ...

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