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Zelenskyy invites Trump to Ukraine to see damage from Russia’s invasion
Sky-high US-China tariffs are a mutual trade embargo that will hurt both sides
Will Trump’s tariff chaos be China’s gain in global trade wars?
Garbage bag giant fined $8.25m for falsely claiming products were recycled plastic
Scunthorpe steelworks: why can’t you just turn a blast furnace off and what is a salamander tap?
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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