Researchers should improve their standards, he wrote in Nature in 2012, but journals should also take a tougher line, " engaging reviewers who are statistically literate and editors who can verify the process" .
Under the deal, which was officially called the Joint Comprehensive Plan of Action, Iran agreed to limit its nuclear program for 15 years and allow international inspectors to verify that it wasn't building nuclear weapons.
Usually associated with Bitcoin, blockchain technology is used for verifying and recording transactions and is now being leveraged for trading in renewable energy.