Michael Mann's hockey stick chart was obviously false. Because of its deceitful appearance, many scientists protested Mann's graph and the data behind it. However, Mann initially refused to reveal any of his data or methods - even though his work was supported by the U.S. government - which made it exceedingly difficult for other scientists to replicate his work. | Michael Mann's hockey stick chart was obviously false. Because of its deceitful appearance, many scientists protested Mann's graph and the data behind it. However, Mann initially refused to reveal any of his data or methods - even though his work was supported by the U.S. government - which made it exceedingly difficult for other scientists to replicate his work. |