Yesterday we brought you some stunning spaceship concept art from the space movie After Earth, by artist Colie Wertz. Now here's another batch, covering the spaceships and cities in the film, from artist Emmanuel Shiu. Exclusively at io9!

Forget putting up four walls and a roof; these homes use the stony walls of natural and human-made caves to shelter their inhabitants from the storm. Check out these incredible rocky homes, from ancient cave dwelling to modern house, to the buildings that may have inspired J.R.R. Tolkien's Hobbiton.

There's something super-comforting about living in a building with super straight lines — it looks sturdy and reliable. But what if you lived in a place that looked like the Hulk had attacked it? Or a tornado had hit it? Here are some livable buildings which look messed up. On purpose.

When Ernest Callenback published his novel Ecotopia back in the 1970s, he crystallized an idea beloved by science fiction writers and urban planners alike. He imagined modern cities that were both high tech and carbon neutral. Here are some ways that people have tried to make his dream real.

Are you fed up with the old and traditional houses with square windows? Move to a spaceship house! Here are a few of our favorites around the world.

Vast mountains hulked like inverted pyramids beneath the streets and viaducts. Below, the atmosphere was an endless hazy blue, marred occasionally by the smudges of towns drifting in the wind. Everyone came here for one thing. They wanted funding for their quantum software startups.

What would happen if we designed new urban megastructures using the latest scientific information about green design? Portland architect Bill Badrick has the answer. The new Columbia River Crossing bridge, in Portland, Oregon, should be a double-decker, carbon-neutral engineering marvel — complete with a huge park on…

When we imagine the future of environmentally sustainable cities, it's common to depict them as forests of skyscrapers with, well, forests on them. But environmental writer Tim De Chant says that architects and futurists need to get real. Skyscrapers will never support trees. Here's why.

From destruction comes rebirth. Chinese architects Xiaomia Xiao, Lixiang Miao, Xinmin Li, and Minzhao Guo dream up a world in which a devastating asteroid has hit, and we use the crater as the site of a thriving city.

There is nothing more awe-inspiring than the sight of a city being built — or destroyed. And that's the point of the photographs in the Engineering News-Record's collection of the best photographs from last year. Check out some incredible shots of enormous machines, magnificent engineering projects, and the people who …