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People navigate cities in much the same way animals navigate their environments. Max Böhme/Unsplash

Cellphone data shows that people navigate by keeping their destinations in front of them – even when that’s not the most efficient route

As you’re walking through city streets on your way to work, school or appointments, you probably feel like you’re taking the most efficient route. Thanks to evolution, you’re probably not.
Very rarely, depending on where you are in the world, your compass can actually point to true north. https://www.shutterstock.com

Explainer: what happens when magnetic north and true north align?

Recently, magnetic compasses at Greenwich pointed directly at true north for the first time in 360 years. This is currently happening in Western Australia too. But what does it mean?
U.S. Navy ships operate in formation in the South China Sea. (U.S. Navy)

Davos oblivious to one of free trade’s gravest threats

China’s actions in the South China Sea are getting scant attention at Davos. But if the Chinese set a precedent for other rogue nations, there will be a profound impact on global free trade.

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