Documentarymania

Simply the Best Documentaries

 Share on Twitter  Share on Google+
Hot Girls Wanted
The Invisible Universe
Project Nim
The Art of Persuasion
Born to Be Wild
The Lost Tribes of Humanity
Nascar The IMAX Experience
Dinosaurs Alive
Escaping ISIS
The Nazis, A Warning From History. Episode 1
Clash of the Gods: Odysseus I
Becoming Human: First Steps
The Knowledge of Healing
Dark Net Rewire
Sex in Space
Behind Closed Doors
Deep Earth
The Normans: Normans of the South
Vegan 2017 The Film
Messengers
The Most Dangerous Band in the World. The Story of Guns N Roses
The Arctic
Bear Necessities
Lo and Behold Reveries of the Connected World
The Death of the Oceans
Life: Challenges of Life
Solving the Secrets
WWII In 3D
Giants
The 21st Century Race for Space
Virunga
Jacques-Louis David
Reagan Gorbachev and Third World: Rise Of The Right
Putins Way
Bugs a Rainforest Adventure
Daft Punk Unchained

Order by   Views  Year  New Added  Featured  Title

The Immortals
The Immortals 2014

This episode covers the nature of how life may have developed on Earth and the possibility of life on other planets. Tyson begins by explaining how the human development of writing systems enabled the transfer of information through generations, describing how Princess Enheduanna ca. 2280 BCE would be one of the first to sign her name to her works, and how Gilgamesh collected stories, including that of Utnapishtim documenting a great flood comparable to the story of Noah's Ark. Tyson explains how DNA similarly records information to propagate life, and postulates theories of how DNA originated on Earth, including evolution from a shallow tide pool, or from the ejecta of meteor collisions from other planets. In the latter case, Tyson explains how comparing the composition of the Nakhla meteorite in 1911 to results collected by the Viking program demonstrated that material from Mars could transit to Earth, and the ability of some microbes to survive the harsh conditions of space. With the motions of solar systems through the galaxy over billions of years, life could conceivably propagate from planet to planet in the same manner. Tyson then moves on to consider if life on other planets could exist. He explains how Project Diana performed in the 1960s showed that radio waves are able to travel in space, and that all of humanity's broadcast signals continue to radiate into space from our planet. Tyson notes that projects have since looked for similar signals potentially emanating from other solar systems. Tyson then explains that the development and lifespan of extraterrestrial civilizations must be considered for such detection to be realized. He notes that civilizations can be wiped out by cosmic events like supernovae, natural disasters such as the Toba disaster, or even self-destruct through war or other means, making probability estimates difficult. Tyson describes how elliptical galaxies, in which some of the oldest red dwarf stars exist, would offer the best chance of finding established civilizations. Tyson concludes that human intelligence properly applied should allow our species to avoid such disasters and enable us to migrate beyond the Earth before the Sun's eventual transformation into a red giant.

Category:Science  Duration:42:00   Series: Cosmos 2014

 
Showing 1- 1  of 1          

Follow our releases!



In  Facebook  


© Documentary Mania 2018