This week, we learned …
What a great image of Jupiter’s Great Red Spot.
NASA / SwRI / MSSS / Gerald Eichstädt / Seán Doran © CC NC SA
Learn more about Jupiter’s Great Red Spot, and the satellite that got there.
The loss of community is perhaps the most surprising and evocative result of a Walmart leaving town.
Photograph by Brave New Films, courtesy Wikimedia. CC-BY-2.0
How did “big box” stores like Walmart become a defining part of the 1990s?
The most familiar type of compass is probably the magnetic compass, which use a magnetized needle lined up with the Earth’s magnetic field. This hand-held magnetic compass is being consulted by U.S. Marine Corps Cpl. Travis Bos at a training exercise in Pohakuloa Training Area, Hawaii.
Photograph by Cpl. Demetrius Munnerlyn, courtesy U.S. Marines
Get started learning map skills with our great collection!
Those big emergency exit doors are impossible to open in a pressurized cabin.
Photograph by Michael Walker, National Geographic
How do people survive flights in non-pressurized areas of the airplane?
What other groundbreakers are launching satellites these days?
Tessellation is the tiling of a flat surface using repetitive geometric shapes, with no overlaps and no gaps. When the shapes used to tile a plane are all five-sided, they are called tessellating pentagons. There are 15 known tessellating pentagons.
Illustration by EdPeggJr, courtesy Wikimedia. CC-BY-SA-4.0
What are some other five-sided beauties?
This galloping horse, the first motion picture ever made, is encoded in bacterial DNA.
Film by Eadweard Muybridge, courtesy Wikimedia. Public domain
What else is encoded in DNA?
As companions, iconography, and sustenance, horses are ubiquitous in Kazakhstan, and have been for centuries.
Photograph by Altaihunters, courtesy Wikimedia. CC-BY-SA-3.0
What else is a part of Kazakh identity?
The secret tunnel extends from the giant pyramid to the Plaza de la Luna, the central square in front of it.
Photograph by diego_cue, courtesy Wikimedia. CC-BY-SA-3.0
Who were the Teotihuacanos?
Eko Atlantic is an enormous land reclamation project built on the coast of Lagos, Nigeria.
Photograph courtesy Eko Atlantic
Where else are coastal community engaging in land reclamation?
Click to enlarge! Map by UN Women
How has the map changed since 2015?