The mystery of exactly how life began. Hunt for microbes that flourished in the most unlikely places: inside rocks in a mine shaft two miles down, inside a cave dripping with acid as strong as a car battery's, and in noxious gas bubbles erupting from the Pacific ocean floor. The survival of these tough microorganisms suggests they may be related to the planet's first primitive life forms. Host astrophysicist Neil deGrasse Tyson deepens the search by investigating tantalizing and controversial chemical "signatures" of life inside three-billion-year-old rocks and meteorites found around the world. Universe list: www.youtube.com/watch?v=UomDc3230VI&index=2&list=PLz5kX9IEOrPOF6adnH-ojL0eci8-2-03K Documentary list: www.youtube.com/watch?v=wQt-nzgGwvY&index=2&list=PL1L9zQimONkUOxXJyM0xcJja9ItQu1P8l Aliens world list: www.youtube.com/watch?v=zIZUcv2vpwk&index=2&list=PLiNz9HwV3MqqrlrFKtUkDwPf1fXYMxUWv Natural phenomena list: www.youtube.com/watch?v=PpYhDfLN0u8&list=PLhlRM1lCeuyhchKXHFmA6Xadak88a4JTU&index=2 Sciencecasts: www.youtube.com/watch?v=3GD_iDMr6O0&index=2&list=PLaLtyo-DXzmjaGwlwXIye21_lhADDY10K Universe documentaries: www.youtube.com/watch?v=j0UPED7wBfs&list=PLLTjZe5oPsgc2vpBnF5DLIuQ-7Yef1c2o

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