A short film (33 min) about the "the amazing story behind one of the revolutionary discoveries of the last 100 years" Beautiful footage and clear explantions of the K-T boundary and how the world changed between the Mesozoic and the Cenozoic eras. As explained in the news release, this film is in three parts to make it user friendly, and this allows for discussion about the content between each act. Act 1: "An Earth Shattering Hypothesis": This introduction includes a brief history of the K-T boundary and how it was discovered, where it led scientists, and how data was collected. The thin layer of clay that was found around the world got them asking questions. This is a good place to ask about how science is done, how this exemplifies the process of science, and how evidence from different disciplines can inform the evidence. Act 1 ends with a discussion about the change in paradigm and the Asterioid hypothesis. Act 2: "Following the Trail of Evidence": This is a discussion of the evidence for the asteriod hypothesis, and how that evidence took scientists on a further journey to the answer. It provides a good point of discussion for how evidence from different places and disciplines can combine to give the whole picture. (begins about 15:30) Act 3: "Mass Extinction and Recovery": discusses 30 years of data and comparison of species before and after the KT boundary. This is a good example of how scientists interpret fossil evidence, and how they can interpret how life evolved since the asteroid impact 65 mya. It ends with the age of mammals, and the implications that the asteriod impact and the changes in the first 1 million years after set the stage for human evolution. (Begins about 22:56). Unlike the first act, Acts 2 & 3 will not make as much sense without the proceeding ifnormation, but if pressed for time they can still be helpful. See the news release here: http://www.hhmi.org/news/mesozoic20121026.html