Seems humans aren't the only ones moving into cities in ever greater numbers.
Today, 8 out of every 10 Americans live in a city or suburb.
In a world of 24-hour news, night tubes and light pollution, does the traditional night time really still exist?
Cheap flights and irresponsible tourists are causing many holiday destinations to become overrun with visitors.
Big data from smart phone and credit cards can uncover the daily rhythms of city life, for all its residents.
Young people raised their voices in the streets and online – but a government crackdown seeks to silence them.
Councils are facing their own revenue crisis – and local businesses are paying the price.
Vertical farms grow more food but use much more energy, so let's consider other kinds of urban agriculture.
Taking this step may improve the quality of life for vulnerable people and reduce the amount of air conditioning they use, making their neighborhoods less prone to power outages.
It can feel much faster to get the bus – but that could all be a matter of perspective.
The UK pioneered smart cards such as Oyster. But now, experimentation is being stifled as cash-strapped councils struggle to deliver basic services.
In Canberra you can build on land you don't own, and it's cheaper.
The right to housing is enshrined in law in the Netherlands and South Africa – so what would it look like in the UK?
Staying at home puts women at greater risk of health problems – cities need to change to encourage them to go outside.
Turnbull put in place the City Deals program in 2015 - aiming to create better partnerships between all levels of government. Some projects are underway, but we need more than just partnerships.
Uncontrolled growth at the expense of the environment will severely exacerbate the impacts of climate change. As shown with tragic floods in India, our cities are not prepared for extreme events.
More and more housing in city-centres is being bought or built for the short-term rental market.
In the region of Liguria, and the city of Genoa itself, Calabrian mafia clans have been infiltrating construction projects for decades.
Problems such as mental illness and drug addiction are confined to a minority of homeless people – and it's preventing others from getting help.
With train fares looking set to rise, there are some simple rules you can follow to get the best value tickets.