From Live Science:
Many Americans think of Labor Day as merely the end of summer and part of a welcome three-day weekend. Its origin, however, is in celebrating the labor movement and workers' rights. So enjoy the break (if you get one in this modern 24/7 world), but if you think you have it tough, consider the hard labor put in by these 10 creatures, all just to survive. The list is courtesy the National Wildlife Federation.
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