Video - NASA Releases New Global Warming Animation 1950 - 2013

This new visualization from a January 21, 2014 report by NASA's Goddard Institute for Space Studies (GISS) shows how global temperatures have risen from 1950 through the end of 2013. NASA scientists say 2013 tied for the seventh warmest of any year since 1880, continuing a long-term trend of rising global temperatures. With the exception of 1998, the 10 warmest years in the 133-year record all have occurred since 2000, with 2010 and 2005 ranking as the hottest years on record.

Video: Interview with Michael Mann on the War on Climate Scientists

Climate Science Watch interviewed Michael Mann on the release of the Penn State University "Final Investigation Report" on allegations of misconduct levied against Dr. Mann late last year by climate change 'skeptics' and denialists. The report concluded that there is "no substance" to the allegations. We also asked Dr. Mann about ongoing attacks on the credibility of climate science and on the integrity of climate scientists, and about his recent comments about the iconic 'hockey stick' graph of the global temperature record.

Video: The Controversy Surrounding Michael Mann's Hockey Stick Graph

Michael Mann created a widely known graph commonly referred to as a "hockey stick." His data shows that the temperature has increased significantly at the same time as man has started pumping CO2 and other greenhouse gases into the atmosphere. Climate deniers tried to refute his results accusing Mann of using faulty statistics, some even suggested that he was guilty of fraud. Although there is some variability, a host of scientists have corroborated Mann's hockey stick. If anything newer research suggests that the earth has gotten even warmer than suggested by Mann's hockey stick.

Video: Climatologist Michael Mann Headlines 2012 U.Va. EnviroDay Event

Climatologist Michael Mann of Penn State University speaks about scientific findings relating to global warming in this University of Virginia EnviroDay appearance. His talk, titled "The Hockey Stick and the Climate Wars: Dispatches From the Front Lines," shows how his findings have brought political heat from some Virginia and national politicians. Mann continues his research and outlines its scientific soundness during this packed public presentation. Prior to his move to Penn State in 2005, Mann served as a professor of environmental sciences at the University of Virginia.

Video: Michael Mann and the Climate Wars

Michael Mann talks about the research related to the scientific finding that the earth is warming. He goes on to discuss the war between those who accept science and reason and those who do not. Mann reviews how he has been subject to criticism for his scientific research. Even though his life and safety have been threatened, he continues to wage war in defense of science. Mann compares the war against the science of climate change to the misinformation campaign efforts of the tobacco industry, some have even compared it to McCarthyism.