How to navigate using Animals Page 2

Sand Collars

My thanks to Ian Ward and John Angus for making me aware of a curious beach phenomenon known as 'sand collars'. The eggs of a sea snail known as the 'moon snail' can create a horseshoe shape that appears to be made of sand. They are flexible and tearable. After…

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Joshua Slocum and the Birds

My thanks to Pertti Pesonen for reminding me of these passages in Joshua Slocum's classic, 'Sailing Alone Around the World': On the 12th, some hundred miles southwest of Christmas Island, I saw anti-trade clouds flying up from the southwest very high over the regular winds, which weakened now for a…

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