Tiny silver balls, held and manipulated by insect limbs, shrinking as if by a magician's trick, inexorably disappear These glittering bubbles are not just ornamental adornments, but spheres of critical life-giving air, an aquatic beetle's lungs in a watery world. How they work is a fascinating story, illustrating how individual organisms can use the external world to fuel their internal metabolism and generate more comfortable homes.
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