What did you learn this week? This week, we learned …
… your middle-school teacher was wrong about Wikipedia.
Photograph by Blend Images/Shutterstock
… the most effective weapon on the modern battlefield is concrete.
U.S. Army soldiers guide a concrete barrier down into position as a crane lowers it to a street opening near the Joint Security Station in Shula, Iraq in 2008.
Photograph by Staff Sgt. Manuel J. Martinez, U.S. Air Force
How has concrete been a crucial part of conquest throughout history?
… Canada just launched the first tidal generator in North America, and is planning to phase out coal-powered electricity by 2030.
Tidal energy is a renewable energy powered by the natural rise and fall of ocean tides and currents.
Illustration by Nick…
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