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teded: Our planet’s diverse, thriving ecosystems may seem like permanent fixtures, but they’re actually vulnerable to collapse. Jungles can become deserts, and reefs can become lifeless rocks. What makes one ecosystem strong and another weak in the

published on: 2015-06-29 02:40:52

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maihudson: Mathematica code:W[x_,y_,w_,a_,t_]:= w((Cos[a] +