The US had a year where pennies were unclad zinc during WWII, so needed was every scrap of copper for the war.
"unclad"? No. The 1943 pennies were steel-clad zinc, and are generally referred to as "steel cents" or "steel pennies".
To say the "new evidence surfaced from Warner Music" is rather misleading. The plaintiffs independently found the evidence; what they got from Warner had the evidence "blurred out". Here's the summary from TFA:
"(1) Warner/Chappell Music (who claims to hold the copyright for the publishing, if it exists) suddenly "found" a bunch of relevant documents that it was supposed to hand over in discovery last year, but didn't until just a few weeks ago, and (2) a rather important bit of information in one of those new documents was somewhat bizarrely "blurred out." This led the plaintiffs go searching for the original, and discover that it undermines Warner Music's arguments, to the point of showing that the company was almost certainly misleading the court. Furthermore, it definitively shows that the work was and is in the public domain."
Warner, of course, denies that conclusion. rsilvergun may be right, but the date of the songbook relative to the date of the "copyright" and of the changes to copyright law would seem to weaken Warner's argument fatally.
The summary was not clear so here is my version based on my understanding of the work:
The research advisor Thomas E. Mallouk suggested trying it without the oxidizer. The researcher Nina Kovtyukhona was reluctant to perform this experiment as she thought it would be a failure. Her advisor persuaded her to try it by making a bet that he would pay her $100 if it succeeded, and she would pay him $10 if she failed. The experiment was a success, and researchers now have a new avenue to explore for synthesizing graphene.
From the article:
"I kept asking her to try it and she kept saying no," Mallouk said. "Finally, we made a bet, and to make it interesting I gave her odds. If the reaction didn't work I would owe her $100, and if it did she would owe me $10. I have the ten dollar bill on my wall with a nice Post-it note from Nina complimenting my chemical intuition."
Looks like you got it backwards in your version.
interlard - vt., to intersperse; diversify -- Webster's New World Dictionary Of The American Language