Planted in a sheltered spot in the garden, the flowers and leaves of oakleaf hydrangea (Hydrangea quercifolia) can last all ...

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White light can be blinding, cold, unforgiving. Our physical reality often finds it too much as well, splitting it apart any chance it gets. Plants are green because such wavelengths of light help it ...

What color is a tree, or the sky, or a sunset? At first glance, the answers seem obvious. But it turns out there is plenty of variation in how people see the world—both between individuals and between ...