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Life in the Slow Lane

For an animal that does little but sleep and eat, the sloth has proved to be a remarkable survivor, hanging out in tropical forests from Nicaragua to Paraguay

Al Gardner is a curious man. Once, while walking at night on Barro Colorado Island, in Panama, the US Geological Survey wildlife biologist came across a sloth clinging to a vine growing from a tall tree. His curiosity piqued, Gardner wanted to take a closer look at the unusual critter. First, though, he had to dislodge it from the tree. He shook and shook the tree, trying to get the animal to let go, to no avail. In the end, Gardner shrugged his shoulders and gave up, then watched as the sloth climbed quickly (at least for a sloth) ...

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