Found something which has no Wikipedia article! 
2022-03-16 A Holonomic Rattleback
So come on, Wikipedia, get with the program! 
Seriously, can anyone else find examples of objects or topics which might reasonably be expected to have a Wikipedia article but don't?
It's a good game, not dissimilar in principle to a Google Whack (a web search returning only one result), but harder than it sounds!
2022-03-16 A Holonomic Rattleback
The rattleback or celt top is a rigid body with the peculiar behaviour of having a spontaneous spin reversion during its motion ..
Seriously, can anyone else find examples of objects or topics which might reasonably be expected to have a Wikipedia article but don't?
It's a good game, not dissimilar in principle to a Google Whack (a web search returning only one result), but harder than it sounds!
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