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Awesome last month
How a tree-hugging protest transformed Indian environmentalism
Puerto Rico declares public health emergency as dengue cases rise
The real time-travel paradox was the friends we made along the way
Bridges that suffered the same fate as Maryland's Francis Scott Key
Most polluted US cities REVEALED - but LA and NYC don't make top 10
Engineers reveal why Baltimore bridge collapsed so quickly
The Ars Technica guide to keyboards: Mechanical, membrane, and buckling springs