PBS Space Time Season 2015 Episode 5 What Will Destroy Planet Earth?

PBS Space Time is a show that explores all things related to space and the universe. Season 2015, episode 5 is titled "What Will Destroy Planet Earth?" In this episode, the host explores the various catastrophic events that could potentially lead to the destruction of Earth.

The episode begins by discussing the history of Earth and its previous mass extinction events. The host talks about the theories behind the extinction of dinosaurs and how it was caused by a massive asteroid impact. From there, the episode transitions into discussing the various potential threats to Earth's continued existence.

One of the first potential threats discussed in the episode is the possibility of another asteroid or comet impact. The host explains how Earth is constantly bombarded by space debris, and it's only a matter of time before another asteroid or comet could collide with our planet. The episode goes on to explore the various ways astronomers are working to detect and deflect potentially hazardous objects.

Another potential threat discussed in the episode is a massive solar flare or coronal mass ejection. These events can release massive amounts of energy and particles into space, which could potentially damage our electrical grid and even cause widespread blackouts on Earth. The episode explores the efforts being made to better understand these events and how we can protect ourselves from their effects.

The episode also delves into the potential threat of a nearby supernova. While such an event would be incredibly rare, it could release a massive amount of energy and radiation that could be harmful to life on Earth. The host discusses how astronomers are working to detect potential supernovae and how we could prepare for such an event if it were to occur.

The host also explores the potential threat of a nearby gamma-ray burst. These are some of the most energetic and destructive events in the universe, and if one were to occur close enough to Earth, it could potentially strip away our planet's atmosphere and oceans. The episode discusses the efforts being made to detect and better understand gamma-ray bursts and the potential ways we could protect ourselves from them.

The episode concludes by discussing the potential threat of a massive volcanic eruption. While not as immediately catastrophic as some of the other events discussed in the episode, a massive volcanic eruption could coat the atmosphere in ash and lead to a "volcanic winter" that could cause widespread famine and other environmental disasters. The host explores the efforts being made to better understand volcanic activity and how we could potentially prepare for a major eruption.

Overall, "What Will Destroy Planet Earth?" is a fascinating exploration of the various potential threats to our planet's continued existence. The episode does an excellent job of explaining these complex and often frightening concepts in an accessible way, and the host's enthusiasm for the subject matter is infectious. Whether you're a space enthusiast or simply curious about the future of our planet, this episode is well worth a watch.