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US attacks on science and research a ‘great gift’ to China on artificial intelligence, former OpenAI board member says
Millions of Australian workers to get an above-inflation pay rise as minimum wage lifts by 3.5%
High-rise, high expectations: is Casablanca’s finance hub a model for African development?
EU agrees to increase flight delay times before passengers get compensation
Amazon ‘testing humanoid robots to deliver packages’
A curious cup and some wacky wheels
Today’s puzzles are about deducing the mechanisms behind two extremely puzzling objects: a practical joke cup supposedly invented by Pythagoras and a vehicle that seemingly travels the wrong way.
1. Pythagoras’s Cup
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