Danish architecture studio BIG has revealed its masterplan for Pittsburgh's Lower Hill District, featuring sloped-roof buildings and an extensive network of pathways (+ slideshow). More about BIG unveils design for urban neighbourhood on site of former Pittsburgh hockey arena
Terese Alstin, founder of inflatable-helmet brand Hövding, has launched an online shop and a Malmö showroom presenting the work of independent women designers from around the world (+ slideshow). More about Female-focused retail platform No Sir challenges male-dominated design industry
Furniture giant IKEA has launched a research hub and exhibition space in Copenhagen to test product prototypes and ways of boosting consumers' wellbeing (+ slideshow). More about IKEA launches Space10 innovation lab to explore the future of home design
ODA New York's residential tower for Manhattan features open-air terraces between the floors, designed to fulfil "the dream of a suburban backyard" (+ slideshow). More about ODA proposes a Manhattan skyscraper with open floors for sky gardens
Toronto has revealed plans to construct a new park below an elevated highway, featuring outdoor performance spaces and a pedestrian and cycle trail. More about Plans unveiled for Toronto park that will stretch under a highway
We've published thousands of beautiful houses since Dezeen was founded. To mark our ninth birthday today, we're revisiting the nine that have been most popular with our readers (+ slideshow). More about The nine most popular houses in the history of Dezeen
This miniature wooden library for a Toronto suburb is designed to provide a public reading nook and book exchange, and folds into a box at night for security (+ slideshow). More about Atelier Kastelic Buffey creates miniature book exchange that folds up into a glowing black box
A new exhibition at London's Design Museum explores contemporary bike design, from Olympic-winning sports models to compact city cycles (+ slideshow). More about Design Museum's Cycle Revolution exhibition celebrates bicycle design
PLP Architecture has revealed plans to build a high-rise housing block in London's Stratford, containing homes modelled on student accommodation. More about PLP Architecture unveils "genuinely affordable" co-living skyscraper for London
Herzog & de Meuron has designed a curving white concrete apartment block for New York's West Village, the latest in its ongoing collaboration with developer Ian Schrager. More about Herzog & de Meuron designs "curvaceous and sexy" apartments on New York's Hudson
World Architecture Festival 2015: architecture firm Spark has unveiled its concept for "the next generation of retirement housing" – a community of homes and health facilities combined with a vertical urban farm (+ slideshow). More about Spark designs model for Asian retirement communities that double as city farms
San Francisco start up Minna Life has launched a portable device that men can sit on to exercise their pelvic muscles and "amplify their sexual fitness" (+ slideshow). More about KGoal Boost is a pelvic training tracker to help men improve their orgasms
London startup the Hummingbird Bike Company has designed a folding carbon-fibre bike that weighs just 6.5 kilograms. More about "World's lightest" folding bicycle weighs less than the average watermelon
Modernist designer Enzo Mari has given Berlin-based CUCULA the rights to redesign and sell his Autoprogettazione furniture to raise funds for its refugee support programme (+ slideshow). More about Enzo Mari grants Berlin refugee organisation rights to reproduce his furniture
Opinion: Manhattan's rash of skinny towers for the super rich is helping turn New York into an extreme work of art. It's a Capitalist Jerusalem made real, says Aaron Betsky. More about "Manhattan is theirs, we just get to admire it"
Japanese designer Tokujin Yoshioka has developed a transparent modular kitchen system with smoked glass surfaces that display the tools inside (+ slideshow). More about Tokujin Yoshioka designs glass kitchen "to show the beauty of kitchen tools"
An image created by French designer Jean Jullien in response to the terrorist attacks in Paris yesterday has gone viral, becoming the most-shared symbol of unity with the French city. More about Jean Jullien's Peace for Paris illustration becomes symbol of unity in wake of terror attacks
Portuguese studio Site Specific Arquitectura has transformed a warehouse at a Lisbon monastery into a minimalist chapel featuring simple furnishings and a lime-green confession booth (+ slideshow). More about Site Specific Arquitectura converts Portuguese warehouse into monastery chapel
Students at the Massachusetts Institute of Technology have designed and built a 2,000-pound sculpture that can be rocked, rotated, lifted, and hauled upright with minimal effort (+ movie). More about MIT students create 2,000-pound "megalith" that can be moved with a fingertip
US rapper Snoop Dogg has launched a line of edible cannabis products with packaging designed by Pentagram to skirt around US laws on controlled substances (+ slideshow). More about Snoop Dogg launches edible marijuana range with branding by Pentagram