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A tern in flight (Iceland).
An inflorescence (a corymb) of cauliflower (Brassica oleracea var. botrytis), a biennal he...
The various shapes of stalactites and stalagmites in a cave.
Pumpkins at a market in Uzbekistan.
This particular cut of watermelon, that has been photographed in a bazaar in Kashgar (Chin...
The line of the horizon makes a contrast with the contorted branches of the tree.
A zigzag-path in Crete.
Plant with a succulent trunk with photosynthetic function and leaves transformed in thorns...
The beautiful geometry of this tree at the Royal Botanic Garden in Sydney (Australia).
Cerchi concentrici di un tronco d`albero.