Horizon Season 2002 Episode 17 The Day the Earth Nearly Died

In the episode "The Day the Earth Nearly Died" of the popular science show Horizon, viewers are taken on a journey back in time to explore one of the most catastrophic events in the Earth's history. The episode begins with an introduction to the late 1950s when scientists first discovered a layer of clay that appeared to have been deposited around 65 million years ago. The clay layer was found to contain a high concentration of iridium, which suggested that it was the result of a massive asteroid impact. This discovery led to the hypothesis that the asteroid impact had caused the extinction of the dinosaurs and many other species.

The episode goes on to explain how scientists have been able to use advances in technology to uncover more information about the asteroid impact and its aftermath. Through the use of radar, satellite imagery, and geological studies, scientists have been able to piece together a timeline of events that occurred in the aftermath of the asteroid impact.

The episode then takes viewers on a journey to various parts of the world where evidence of the asteroid impact has been found. Viewers are taken to locations in Mexico, where the impact crater is located, and to sites throughout North America and Europe, where the effects of the impact can be seen in the geological record.

Throughout the episode, viewers are given a detailed explanation of the various ways in which the asteroid impact affected the Earth. They learn about the massive waves that would have been created by the impact, which would have destroyed anything in their path, and the massive fires that would have erupted as a result of the impact. The episode also explains how the impact would have caused a significant change in the Earth's climate, with temperatures dropping dramatically for an extended period, which would have had a devastating effect on the planet's ecosystems.

In addition to exploring the effects of the asteroid impact, the episode also examines the potential threat posed by future asteroid impacts. Viewers are introduced to NASA scientists who are tasked with tracking potentially hazardous asteroids and developing strategies for deflecting them if necessary. The episode highlights the importance of continued investment in asteroid detection and deflection technologies, both to better understand the threat posed by asteroids and to be prepared in case of a future impact.

Overall, "The Day the Earth Nearly Died" is a fascinating exploration of one of the most significant events in the Earth's history and the ongoing efforts to understand and mitigate the potential threat posed by asteroids. With stunning visuals, expert commentary, and thorough research, this episode is a must-watch for anyone interested in the science of our planet and the universe beyond.