Yes, e.g. the recent "Quantum Levitation" was submitted 5 times before the successful one: http://www.hnsearch.com/search#request/all&q=Quantum+Levitation http:

Yes, e.g. the recent "Quantum Levitation" was submitted 5 times before the successful one: http://www.hnsearch.com/search#request/all&q=Quantum+Levitation http://www.hnsearch.com/search#request/all&q=Quantum+Lev...