What did you learn this week? This week, we learned …
Photograph by Blend Images/Shutterstock
How I Learned to Stop Worrying and Love Wikipedia: Here are our 10 reasons teachers should be using Wikipedia as a resource.
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?
Tidal energy is a renewable energy powered by the natural rise and fall of ocean tides and currents.
Illustration by Nick Kaloterakis, National Geographic
Why is tidal a “truly alternative energy” source?
Bamboo is the world’s largest species of grass—which I suppose makes this tranquil forest in Nanjing, Jiangsu, China, a beautifully manicured lawn. Bamboo’s sturdy, fibrous texture leads many organizations to consider it a forestry product, however—a tree.
Photograph by Luis Marden, National Geographic
What other industries are using biomimicry to improve technology?
The ocean is just one ecosystem where it’s noisier now than it’s ever been.
Illustration by Stefan Fichtel, National Geographic
How can you help students capture a moment of silence in a noisy world?
A pesticide fog (designed to kill flies) hangs over a market in Cairo, Egypt, in 1972.
Photograph by Winfield Parks, National Geographic
Are biopesticides a better solution?
Help your students get started on spatial concepts with this classroom mapping exercise!
How do the government and industry respond to piracy?
The Quinault rain forest on Washington’s Olympic Peninsula may be the quietest space in the continental United States.
Photograph by Sam Abell, National Geographic
What are seasonal wetlands?
Standard chart of “International Flags and Pennants” of the International Code of Signals, printed in 1969.
Image courtesy Wikimedia. Public domain.
How are flags important for communication and identity?
Can you find the old (Rangoon) and new (Naypidaw) capitals of Myanmar (Burma)?