Cosmos – Episode 2: Some of the things that Molecules Do

24 de August de 2017

In 2014 Netflix released a new series of documentaries called Cosmos: A Spacetime Odyssey. It has wonderful pictures and lots of interesting information.

This series is presented by astrophysicist Neil deGrasse Tyson and has 13 episodes, which can be considered a second part of the series of documentaries Cosmos presented by Caril Sagan in 1980.

The whole series is wonderful, but specifically the second episode is about evolution and coding, which is linked to the topic covered in this blog. Although it does not deal deeply with the genome issue, the episode is at least interesting, especially for people who do not have so much knowledge on the subject.



Resume from wiki:

The episode covers several facets of the origin of life and evolution. Tyson describes both artificial selection via selective breeding, using the example of humankind’s domestication of wolves into dogs, and natural selection that created species like polar bears. Tyson uses the Ship of the Imagination to show how DNA, genes, and mutation work, and how these led to the diversity of species as represented by the Tree of life, including how complex organs such as the eye came about as a common element.

Tyson describes extinction of species and the five great extinction events that wiped out numerous species on Earth, while some species, such as the tardigrade, were able to survive and continue life. Tyson speculates on the possibility of life on other planets, such as Saturn’s moon, Titan, as well as how abiogenesis may have originated life on Earth. The episode concludes with an animation from the original Cosmos showing the evolution of life from a single cell to humankind today.



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