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Sophia Epstein

The 10 Year Challenge is back. You still shouldn't do it

How to use psychology to get people to answer your emails

Everyone needs to stop building giant glass skyscrapers right now

London banned cars for one day. Why not do it forever?

The real reason Airbus is retiring its A380 superjumbo jet

How to speak confidently in public: Virtuozo's top public speaking tips

Growing underground: the hydroponic farm hidden 33 metres below London

How the Royal Mint produces two billion coins a year

Kickstarting classical music: Emika on crowdfunding an orchestra for her new album

This tiny Q-Bot could save you a fortune on heating bills

How to make your own Pi-powered vegetable orchestra

These floating murals are designed to disappear

Patience and Marsquakes: inside Nasa's InSight mission to Mars

Virtual and real worlds collide in this drone-filmed music video

This bridge-building supercrane can lift 1,750 tonnes

These rescue robots are efficient lifesavers

The custom-made town where driverless cars learn to drive

These walls eat smog

This striking art is actually an oily suspension of nanoparticles

Singapore can't expand outwards -- so it's going underground