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Trophic rewilding seeks to rehabilitate degraded ecosystems by repopulating them with large animals, thereby re-establishing strong top-down interactions. Yet there are very few tests of whether such initiatives can restore ecosystem structure and functions, and on what timescales. Here we show that war-induced collapse of large-mammal populations in Mozambique's Gorongosa National Park exacerbated woody encroachment by the invasive shrub Mimosa pigra-considered one of the world's 100 worst invasive species-and that one decade of concerted trophic rewilding restored this invasion to pre-war baseline levels.

"As readers know, I'm very dubious about assigning agency to generational cohorts like "Millennials," or "Boomers." Where, after all, are their offices on K Street? And if the Powers That Be need to find enough "Millennials" willing to help them continue their project of world domination, that they will do. However, it does seem that the the series of military debacles following the invasion of Iraq has dented our sense of American Exceptionalism, and has begun to shape public opinion - for the better, so far as I am concerned. A cautionary note would be "Millennial" support for globalization (which has, after all, brought us the iPhone, along with the figure of the selfie-taking backpacker). If I were a nimble 1%-er, I'd be perfectly happy to discard American Exceptionalism as an ideology, as long as I could control the global supply chain (and had a high-altitude, remote pied-a-terre from which to manage the free movement of my capital)."

A type of nylon, the material's shape memory properties enable it to be stretched and molded but able to reform into its original shape when heated. This makes it useful for medical devices such as bone replacements, where minimally invasive surgery techniques require additional flexibility in implant materials.

It takes a gallon of water to produce one almond. And that's not the most insane fact about the mad dash to plant the thirsty trees in the middle of a catastrophic drought.