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Ecologist Rob Dunn's new book describes the tiny life forms, helpful and risky, that live in different parts of the home, including on floors and in water faucets, basements and heating systems.

Cheap knock-offs don't provide anywhere near the protection or durability of the products they replace. And most riders won't be able to tell the difference between real and counterfeit helmets.

From teachers running for office to ballot measures that can add billions to public education, here's our guide to how the issue is playing out.

Facebook says 126 million people may have seen Russian content aimed at influencing Americans. Marketing gurus say Facebook is unlikely to solve the problem because of its ad-based business model.

Eight months after it was devastated by twin hurricanes, the national park on St. John in the Virgin Islands is still recovering. Volunteers have stepped in to help clear trails and rebuild.

As head of the Centers for Medicare and Medicaid Services, Verma says she's working to ease safety rules and lighten licensing requirements, to expand the number of hospital beds and health workers.

Patients in San Diego and across the country urge the FDA to expand the legal use of fecal microbiota transplantation.

Apple growing is a ruthless business obsessed with good looks. Higher temperatures affect every part of of the fruit's life cycle, from more pests to changing color — and can even give them sunburn.

The coronavirus outbreak has set off an unexpected surge in California's legal marijuana market. Companies are reporting big jumps in deliveries and sales, as consumers stock up for lockdowns or simply light up in search of relief during anxious times.

Many Americans turn to crowdfunding to pay for medical care. But sometimes the money covers unproven treatments. Should crowdfunding companies be held accountable for spreading false hopes?