Earth鈥檚 oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research from the 痳豆在线 shows.
Tag: Matt Koehler
Earth鈥檚 oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research from the 痳豆在线 shows.