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" How did this group become a worldwide phenomenon in a span of two years ? There is beauty in seeing nativities made to reflect indigenous culture , reflecting how deeply the nativity story has been absorbed by different societies . All data will be in compatible units , whether it 's scientific data or operational data - - such as how far a rover must travel to reach the edge of a crater . For the person approaching a subject , the simple thing is his purpose - - the use he desires to make of material , tool , or technical process , no matter how complicated the process of execution may be . How do a broad age range of children respond to virtual interfaces ? So , how did this project turn out to be user-friendly and powerful concurrently ? If we had known how complicated the site was we would have purchased a book at the entrance . How did this come about ? After spending some time with us , they realized how complicated the situation was , and they were as confused as we were .