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Since January 1, 2014
2600+ courses starting
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My Notes on Massive Open Online Course:
Our Earth: Its Climate, History, and Processes
Develop a greater appreciation for how the air, water, land, and life formed and have interacted over the last 4.5 billion years.
Notes on 2 Lectures I Watched in This Course:
Measuring Geologic Time
Rocks and Minerals
1 Vocabulary Words I Learned in this Course:
stromatolites, n. [stroh-MAH-toh-lights] from the Greek στρώμα (mattress) and λίθος (rock), layered bio-chemical accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms, or multi-layered sheet of microorganisms, especially cyanobacteria, a phylum (or division) of bacteria that obtain their energy through photosynthesis  "By producing gaseous oxygen as a byproduct of photosynthesis, cyanobacteria are thought to have converted the early reducing atmosphere into an oxidizing one, causing "rusting of the Earth" and dramatically changing the composition of life forms on Earth by stimulating biodiversity and leading to the near-extinction of oxygen-intolerant organisms, and thus stromatolites provide ancient records of life on Earth through fossil remains which might date from more than 3.5 billion years ago."