231: Retro-Walking

Plus, bad vibes versus good data, airships, weeding robots, and progress on tuberculosis, yellow fever, human rights in Latvia, carbon emissions in China, solar in Poland, and deforestation in Colombia.

231: Retro-Walking
During the 19th century, the activity of 'retro-walking' was little more than an eccentric hobby, but today research is revealing it can have real benefits for your health and brain. Credit: BBC
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