In short, "floating particles can travel upstream as much as 1 cm up a waterfall and several metres up a channel against a downstream fluid flow." (this is from

In short, "floating particles can travel upstream as much as 1 cm up a waterfall and several metres up a channel against a downstream fluid flow." (this is from the actual paper and not even mentioned in TFA despite it being the subject. Thanks, Nautilus...) It's surprising that such an easily observable and probably very frequent effect wasn't described in detail until 2013! Though I'd guess this effect has already been mastered and used since times immemorial by freshwater fish and other current-riding creatures. Either way I'll make sure to blame the Bianchini effect whenever my kettle is full of leaves (why does the article insist on calling him Bianchi instead of Bianchini? Am I missing something cultural with last name contraction?)