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Property address has long been a problem in Ghana Wikimedia Commons

Ghana digitised its address system: its failure offers lessons to other African countries creating smart cities

Ghanaians aren’t using the new ‘smart’ street address system which was intended to improve service delivery.
The SS “Leecliffe Hall” sailing on the Welland Canal, Ontario, shortly before it sank in the St. Lawrence. (Matt Miner Collection)

Discovering the three largest shipwrecks in the St. Lawrence River

The St. Lawrence is one of the most difficult rivers in the world to navigate. It has been the site of collisions, groundings and shipwrecks. Several thousand wrecks lie beneath its surface.
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?

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