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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.

Genre: Science  Duration: 42:00

Related Searches: Biology, The Universe, DNA, Panspermia, Genetics, Mars, Exoplanet, Extraterrestrial, ET, SETI, Neil deGrasse Tyson

Series: Cosmos 2014

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IMAX Hubble
Journey to the Edge of the Universe
New Dawn
Dawn Of Humanity
Rivals
The First Christianity
Planet Ant Life inside the Colony
Life of a Universe Creation
History of the Eagles 1
The Worst Car in the History of the World
Building the Sun The 250 Million Degree Problem
Machu Picchu Decoded
No Impact Man The Documentary
The 21st Century Race for Space
Holy War
Bomb It
Quantum Computing
Robots
10 Things You Need to Know about the Future
The Search for a New Earth
Everything
Alien Technology
Dynamic Salt
The Day the Dinosaurs Died
The Beatles Eight days a week
Underwater Universe of the Orda Cave
Woody Allen A Documentary 1
Finding Atlantis
Samurai Sword
What If Cannabis Cured Cancer
Planet Dinosaur Ultimate Killers
Exoplanets
Snake Killers Honey Badgers of The Kalahari
Planet Ocean
George Harrison Living in the Material World 1 of 2
The Art Of The Impossible


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