You might have found that your ears go pop when you are taking off in an aeroplane, or if you’ve been swimming. Hallux explains what’s at play.

The Great Fire Trail: a free Time Hunters history walk around the City of London
1:02:38

Marina Ventura and The Micro-Gridders: Your Go... Designing A Grid of the Future
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Marina Ventura and The Micro-Gridders: Energy Guzzlers
05:27