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How does that work?

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A wind turbine on a hillside in the mountains
  • Energy
  • Environment & sustainability
  • Chemical
  • How does that work?
  • Issue 96

How do electrolysers work?

Electrolysers are a critical net zero technology used to produce green hydrogen.

Quick read

A scanning electron microscopy image of a spider mite crawling on a microelectromechanical system.
  • Electricals & electronics
  • Technology & robotics
  • How does that work?
  • Issue 94

Microelectromechanical systems (MEMS)

Microelectromechanical systems (MEMS) help to make many of our everyday items work, from Air Pods to airbags.

Quick read

  • Technology & robotics
  • How does that work?
  • Issue 93

How do drone displays work?

From London’s new year fireworks to the Tokyo 2022 Olympic opening ceremony, coordinated drone displays are creating spectacular light shows in the night skies, with clever engineering creating a system that can be flown safely and repeatedly.

Quick read

A cartoon of a woman with a smartphone next to her showing it has recognised her face.
  • Technology & robotics
  • Software & computer science
  • Sports & leisure
  • How does that work?
  • Issue 92

Face filters

It started with face swaps, flower crowns and appended dog ears. Now, all manner of transformative sorcery is just a tap away.

Quick read

  • Software & computer science
  • Arts & culture
  • How does that work?
  • Issue 91

How do NFTs work?

Love them or hate them, NFTs took the art world by storm in 2021. But even this far into their explosion in popularity, many people still have no idea what they are and how they work.

Quick read

A black and white close up picture of a robotic vacuum.
  • Electricals & electronics
  • Technology & robotics
  • How does that work?
  • Issue 90

Robotic vacuum cleaners

Twenty years after the Roomba's original release, the latest generation of robotic vacuum cleaners incorporate sophisticated machine vision technology to steer clear of electrical cables, stray socks and pet poo.

Quick read

  • Chemical
  • Health & medical
  • How does that work?
  • Issue 89

Wastewater epidemiology

Sampling and testing of wastewater is helping governments across the world to track COVID-19 infections on a large scale.

Quick read

  • Chemical
  • Environment & sustainability
  • How does that work?
  • Issue 88

Compostable plastics

Compostable plastics can be turned – alongside food and other organic waste – into compost. But how environmentally friendly are they really?

Quick read

  • Health & medical
  • Design & manufacturing
  • How does that work?
  • Issue 87

Lateral flow tests

During the pandemic, millions of people took lateral flow tests every week to detect COVID-19, enabling them to get a result in just 15 minutes.

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A cartoon of a robot head in a speech bubble
  • Software & computer science
  • Technology & robotics
  • How does that work?
  • Issue 86

How do chatbots work?

As human interaction online gradually gives way to automated responses, chatbots must impersonate us without attempting to replicate human empathy or enthusiasm.

Quick read

A person with blow-dried blue and pink hair
  • Design & manufacturing
  • Sports & leisure
  • How does that work?
  • Issue 85

Electric hairdryers

Invented in the 1920s, the electric hairdryer is an everyday household object that has changed significantly over the past century – and is likely to continue developing as technology evolves.