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
The Virgin of the Rose Bush (oil on panel)
XIR155396 The Virgin of the Rose Bush (oil on panel) by Lochner, Stephan (fl.1442-1451); 50.5x40 cm; Wallraf Richartz Museum, Cologne, Germany; (add.info.: La Vierge au Buisson de Roses;); German, out of copyright
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Fruit-powered clock. In this experiment each apple is a voltaic cell. The apples have been connected to make a battery. Copper (orange) and zinc (silver) electrodes have been inserted into the apples and connected to wires to produce electricity.
© Friedrich Saurer
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