Lead Stories
Teaching AI to reason
In the search for reliably autonomous artificial intelligence, researchers are layering AI with rationality.
Getting to know the brain
Researchers around the world are collaborating in an effort to understand the human brain in unprecedented detail.
The future of cities
Cities will determine the Earth's future. Therefore, humans need to create the right kind of cities. Here's what that means.
Birds and the city
Sparse remnant habitats can boost urban biodiversity if native trees are left alone, and waterfronts are not tampered with.
Walking the green talk
The future belongs to cities where you can get to anywhere in under 15 minutes.
