Trans Mountain Pipeline Expansion Blocked / Beyond the Headlines / Volunteers Test Drinking Water in Puerto Rico / Crop Pests in a Warmer World / Eager: The Surprising Secret Life of Beavers Canada's Federal Appeals court has ruled that the Trudeau government improperly reviewed the controversial Trans Mountain Pipeline Expansion, likely delaying the project past Canada's elections in 2019.

Also, meet the citizen scientists who got to work testing Puerto Rico's water sources for safety in the wake of Hurricane Maria.

And we bring you a tale of how the largest rodent in America, once trapped almost to extinction, is being brought back thanks to a "beaver love motel" and a growing cadre of fans.

The "beaver believers" and more, in this installment of Living on Earth from PRI.

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