The NYTimes Magaine has a short piece on the herd of elephants in China who've gone walkabout. Apparently they just took off in search of better, perhaps because of disturbances in their environment and have now traveled 300 miles. The article suggests the excursion is a model of how nature adapts to change.
To me it suggests what humans have done over the millennia--how we have traveled from Africa across the world reaching every continent and significant island by 1300 CE (except Antarctica.)
I've read one book (Wrangham?) suggesting that periodic shifts in Africa from moist to dry had the effect of pumping humans out of Africa. So we are elephants too.
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