Peter Wyngarde memorabilia snapped up at auction
Snakeskin jacket among items belonging to cult star who played Jason King from 1969
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Utrecht rooftops to be ‘greened’ with plants and mosses in new plan
‘Vertical forest’ tower will have 10,000 plants on its facade in bid to reinvigorate biodiversity
10 virtual tours of the world’s most famous landmarks
They’re closed for now but you can still take an interactive online tour, to gaze over the edge of Machu Picchu and marvel at the Pyramids from every angle
• 10 of the world’s best virtual museum and art gallery tours
10 of the world’s best virtual museum and art gallery tours
The originals are out of reach for now, but you can still see world-class art – without the queues or ticket prices – with an online tour of these famous museums
Put Earth first: can a greener, fairer fashion industry emerge from crisis?
After Covid19, the best we can hope for the fashion industry is a rebirth that puts people and planet ahead of profits. Earth Hour this Saturday is a further reminder that every moment counts
Ai Weiwei: ‘An artist must be an activist’
The Chinese artist answers questions from Observer readers and art world luminaries on creativity and protest, Chinese politics – and why he never cooks the same dish twice