Huge value can be unlocked if you measure cities in a certain way. Take Birmingham, Lyon and the humble tram
Humans have always lived on water. But these floating communities of hexagons - unveiled at the UN - are something else
Open: 2019 brings together activists and coders - to explore how to collaborate at a big scale
Can we transform the world by 2031? A new BBC Ideas video shows how we've made major shifts before
Striking and simple: lines of light mark the inevitable sea level rise from climate change
Trigger Warning - Superflux's meditation on fake news, post-truth and the awareness we need
Drummer Queens, voice boxes for the mute, 21stC unions, AI that customises drugs for you: TED's 20 New Fellows
“A system that privileges rationality over emotion is a system that protects the status quo”. How stories can help break through
What is "soft infrastructure"? Maybe it's using the batteries of parked electric cars as stores for renewable energy
Tempo, Horizons, Patterns: Eric Liu on three ways we can shape time to serve our citizenship
A journey around the Earth, in real time, over 90 mins. Feel like a global citizen, for once
"In Turkey, the government uses the media. We use the street - to splash art in their eyes"
Alternative Editorial: We Are All Radical Animals
Harmless Home and Passivehaus: residences that help you get to zero carbon
We don’t know what we don’t know…and somebody is constructing our ignorance. Welcome to agnotology
Neither animal, nor plant - just protein and electricity, leading to... Electric Food. The ultimate sustainable meal
Some clean-energy technologies just got a billion dollar investment boost
Saul Griffith's commitment to showing how much individuals--and entire superpowers--can benefit from "energy literacy"
The vegetarian and vegan mainstream is widening. Is there room in there for "clean meat"?
Plymouth's Nudge Community and Birmingham's Impact Hub both feature on Nesta/Observer's 50 "New Radicals"