This week on Dezeen: Elon Musk, the founder of electric car company Tesla, mocked Apple's plans to move into the electric-car market, while industrial designer Marc Newson created controversy with a tea set that features handles made from mammoth tusks (pictured).

Asked whether he takes Apple's rumoured electric car ambitions seriously, Musk – who also founded PayPal and Space X – laughed and asked if the interviewer had ever "taken a look at the Apple Watch".

Meanwhile Marc Newson's £82,000 silver tea set for Danish metalware brand Georg Jensen proved contentious for its use of "responsibly sourced" mammoth ivory.

In other news this week, we reported on London's emergence as the global centre for the collectible design market and published a UK government report claiming that London creatives earn a higher hourly wage than those in non-creative jobs.

Zaha Hadid hit the headlines again as she claimed the UK's capital is too conservative and generic when it comes to architecture, while a smaller version of Thomas Heatherwick's New Routemaster bus was revealed – although the British designer had no involvement in its design.

The overhaul of a Modernist 1950s school for girls in London by Allford Hall Monaghan Morris won the RIBA Stirling Prize 2015 and we revisited Chicago to ask whether the city is stuck in the past, or reclaiming its reputation as a pioneering architectural centre after hosting its first architecture biennial.

We published BIG's scheme for an art gallery designed to twist across a river in Norway and aerospace company Boeing released a movie showcasing the strength of what it describes as "the world's lightest material".

Renzo Piano unveiled plans to convert a power station on the banks of Moscow's Moskva river into a new venue for contemporary art, and Dutch firm MVRDV completed an office block designed to look like a four-petalled flower in Shanghai.

MVRDV also finished work on a bleacher-topped tennis clubhouse in Amsterdam this week, while Dutch compatriot Maarten Baas became the latest designer to foray into architecture with his residential development planned for an "ugly location" in Eindhoven.

Popular projects this week on Dezeen included cocooned beds for cats, Matali Crasset's claw-shaped rings and a stark white home perched above the coastline of Zante.

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