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A lot of us take stuff for granted, whether it's a friend, a family member or the latest technological gizmo. We even take our dear planet for granted, and that's a pretty shabby way to treat our unique home.

Why is Earth just right for life when other planets are so inhospitable? Find out why Earth is just right for life.

Full article at HowStuffWorks.com.

Total aggregation of HowStuffWorks.com.

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