Every night, the vast majority of North Korea goes totally black. South Korea and China burn with a reddish yellow glow, sandwiching North Korea so it looks like a body of water.
The contrast stems from North Korea's lack of electricity. It produces only 739 kilowatt hours per capita, according to the World Bank, while South Korea produces 10,162. The United States produces 13,246 kilowatt hours per capita.
Astronauts aboard the International Space Station captured these shots, below, while flying over east Asia. They're some of NASA's most jaw-dropping photos of the Korean peninsula at night.