Three-toed sloths have a unique abdominal design; their innards are fixed to their lower ribs to avoid squashing the lungs while hanging upside down, a study has found. The South and Central American ...
The ponderous creatures, which spend 90% of their lives upside down, have internal organs fastened in place to prevent them squashing their lungs. Famous for their slow pace of life, sloths can take a ...
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