Today more and more technology is becoming invisible, and we can only see how things works through computer graphics. Hermann Böhm had the idea of showing us what they're missing.
In his model cars and trains, you can see the parts moving.
The whole debate over conventional farming is driving increased research into lab-grown meat. Many startups see it as a business opportunity. But the challenges they face are huge.
Meat regularly leads to conflicts. In Germany, cows and pigs are factory farmed - triggering protests from animal rights activists. In Ghana, meanwhile, cheap meat from the US and Europe is putting local farmers out of business.
Meat is in many cases an indicator of prosperity. That's because consumers generally choose which meat they want, how much they eat and where and how it's produced - a cheap product from the supermarket or higher-priced meat from ethical farming.
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