Weeds grow at London's Chelsea Flower Show

Nettles, dandelions, brambles: weeds—once considered a scourge—are taking pride of place at London's Chelsea Flower Show as gardeners concern themselves more than ever with biodiversity and sustainable development.

Why banning hikes to the world's tallest tree will never work

The National Park Service is trying to preserve the world's tallest tree by banning hikes to it. But this approach will never completely work since the location of the 380-foot redwood is an open secret. Instagrammers and ...

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