TED Talks Daily An ancient rock suggests a new theory for how life started | Tara Djokic
Oct 7, 2019
Tara Djokic, an astrobiologist, has made a groundbreaking discovery of an ancient rock in Western Australia that could redefine how we understand the origins of life. She discusses the implications of this find, suggesting life may have begun in hot springs rather than the ocean. Djokic challenges traditional timelines and theories, emphasizing the significance of geological conditions in life's development. Her insights connect ancient biology to modern environmental issues, prompting a deeper reflection on humanity's role in the universe.
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Earth's Uniqueness
- Earth is unique for having plate tectonics, liquid water, and an oxygen-rich atmosphere, making it suitable for life.
- Ancient rocks, like those in Western Australia, record pivotal moments in Earth's planetary evolution and contain evidence of early life.
Geyserite Discovery
- Tara Djokic discovered a geyserite rock, indicating the presence of hot springs, in the Pilbara region of Western Australia.
- This discovery suggests that life on land, near hot springs, could have existed three billion years earlier than previously thought.
Origin of Life
- Darwin suggested life might have originated in a "warm little pond" (hot spring) with various chemicals.
- While deep-sea vents are considered a likely origin, hot springs offer an alternative theory supported by geological findings.