White snow, twinkling lights, brass menorahs, Kwanzaa unity cups and a red-and-green potted poinsettia centered on a table.

Parasitic weeds extract water and nutrients from their host plants. But what makes these parasites so successful? A study led ...

This is summer: even when it isn't hot, the sun is flesh-burning. Summer's scents lure you out from the air-conditioning. All that is necessary to enjoy sitting on the grass, or smelling the lake, the ...