Hammering a hardened wooden nail (VIDEO) Cell Press This video is under embargo. Please login to access this video. Caption This video shows a researcher hammering together three boards with a hardened wood nail. Credit Bo Chen Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.