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Ede Ijjasz-Vasquez, Elif Ayhan |

As the world becomes increasingly urbanized, the number of megacities is growing rapidly. Today there are 37 cities worldwide with populations of greater than 10 million, and 84 with populations…

Philip E. Karp, Peter Ellis, Barjor Mehta |

[[tweetable]]How fast is your city growing? The answer may depend on where you live.[[/tweetable]] There are the booming megacities such as Tokyo, Mumbai, and Nairobi. Then there are cities that…

Ede Ijjasz-Vasquez, Paula Restrepo Cadavid |

Also available in: Русский | Română | Türkçe Ruins of the Church of Saint Paul, following the 1755 Lisbon earthquake. (Photo via Wikimedia Commons) [[tweetable]]Did you know that, in 1755,…

David Sislen, Alanna Simpson, Yann Kerblat |

In 2006, I was working in Aceh, Indonesia (with the Red Cross), a region devastated by the 2004 Indian Ocean tsunami. Amongst other post-disaster recovery activities, we were working with 20…

Saurabh Dani |

Many urban residents these days will find it hard to imagine a life without mobile apps that help us locate a restaurant, hail a cab, or find a subway station—usually in a matter of seconds

Xueman Wang |

Upon completion of the MOSE project in 2018, a series of flood gates between Venice's Lagoon and the Adriatic Sea will protect the city from high tide and storm surges. Credit: NASA Venice…

Linh X. Le |

Ancient cities, like Mohenjodaro in modern-day Pakistan, emerged relatively recently in human history (photo courtesy of Saqib Qayyum used through a Creative Commons license.)​ The growth of large…

Chandan Deuskar |

On the eve of Earth Hour, taking place this Saturday 23 March, WWF this week announced the City of Vancouver in Canada as its Global Earth Hour City Challenge Capital 2013 at an award ceremony in…

Jim Leape |