Ocean currents off the Americas
Ocean currents off the Americas. Satellite-based graphic showing ocean currents (swirling coloured lines) on an Earth globe centred on the Americas. The colours indicate ocean temperatures, ranging from the warm tropics (red) to cooler water (green) in more temperate latitudes. Ocean currents seen here include the warmer Equatorial Counter in the Pacific (centre left), and the Gulf Stream in the Atlantic (upper right). The dusk terminator (day-night line) is at lower right, marking the places from where the Sun is seen setting in the west as the Earth rotates on its axis.
© KARSTEN SCHNEIDER/SCIENCE PHOTO LIBRARY
Ripe cashew nut
Ripe cashew nut. Image 2 of 2. Native to South America, the cashew (Anacardium occidentale) is now widely cultivated throughout the tropics. Cashew trees produce a fruit, known as an 'apple' (centre), and a nut (lower centre). The nut forms before the fruit swells and ripens, which takes two months. Once harvested, the fruit is often discarded in favour of the nut, although it can be used to make jellies, jams and juice. The nut must be removed from its shell with care, as the shell contains an allergen that can cause dermatitis. Cashew nuts are used in a variety of sweet and savoury recipes. Photographed in Grenada. See B790/237 for an unripe cashew nut.
© DAVID NUNUK/SCIENCE PHOTO LIBRARY
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