Every time the temperature drops, a cloud passes overhead, or the sun sets, a plant makes a choice: Keep its microscopic ...

From sweltering hot summer days to frigid winter nights, many people can experience exacerbations in respiratory symptoms of asthma, allergic rhinitis, or viral infection. The incidence of extreme ...

Water exerts the pressure caused by its own weight and that of the air above it, equally in all directions ; and on this principle depends the hydraulic pressone of the most useful applications of ...