Gardens, waterfalls, parks… what is happening to our airports?

From Beijing to Istanbul, exotic new airports are symbols of prestige for strongman leaders. But the environmental cost is massive…

Karl Lagerfeld remembered by Carine Roitfeld

10 September 1933 – 19 February 2019
The French fashion editor remembers a passionate man of ideas who always remembered the small details

• Mary Warnock remembered by Onora O’Neill
• Read the Observer’s obituaries of 2019 in full

Twenty tech trends for 2020

From new gaming consoles to activism at Apple, we predict the things you will – or won’t – see in tech this year

The 20 best gadgets of 2019

From a brilliant e-bike to a robot unicorn and a table lamp that doubles as a wireless speaker… the year’s top devices

Hello, Robot review – where human and machine don’t quite meet

V&A Dundee
From pet cyber-seals to cars with minds of their own, an exploration of the science and fiction of robots raises more questions than it answers

Cars: Accelerating the Modern World review – revolutions behind the wheel

Victoria and Albert Museum, London
The V&A’s finely tuned exhibition tracing the history of the automobile attempts to balance the car’s wide-ranging cultural impact with the environmental costs of its gas-guzzling success