Related topics: population

Big cities feed on their hinterlands to sustain growth

Researchers at Linköping University in Sweden call into question an influential theory of the self-reinforcing dynamics of urban growth. Their research, published in Science Advances, shows that big cities feed on their ...

A better way to count boreal birds

Knowing approximately how many individuals of a certain species are out there is important for bird conservation efforts, but raw data from bird surveys tends to underestimate bird abundance. The researchers behind a new ...

How do religious ideologies spread?

Over the last 2000 years Christianity has grown from a tiny religious sect to the largest family of religions in the world. How did Christianity become so successful? Did Christianity spread through grass-roots movements ...

Democracy in decline for one-third of the world

2.6 billion people—a third of the world's population—live in countries where democracy is in retreat, according to a new study based on the largest dataset on democracy, published today in Democratization. The research ...

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