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At current rates of primary production, today's concentration of oxygen could be produced by photosynthetic organisms in 2,000 years. [4] In the absence of plants, the rate of oxygen production by photosynthesis was slower in the Precambrian, and the concentrations of O 2 attained were less than 10% of today's and probably fluctuated greatly.
The lack of oxygen-producing plants will cause free oxygen in the atmosphere to disappear, making animal life impossible. [211] 1–5 billion Various The estimated end of the Sun's current phase of development, after which it will swell into a red giant, either scorching or swallowing Earth, will occur around five billion years from now ...
The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, [2] was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen. [3]
Alabama, unless stopped by the courts, intends to strap Kenneth Eugene Smith to a gurney Thursday and use a gas mask to replace breathable air with nitrogen, depriving him of oxygen, in the nation ...
If Earth is not ejected during a stellar encounter, then its orbit will decay via gravitational radiation until it collides with the Sun in 10 20 (100 quintillion) years. [110] If proton decay can occur and Earth is ejected to intergalactic space, then it will last around 10 38 (100 undecillion) years before evaporating into radiation. [111]
Texas executed eight inmates last year and five this year. The following are the five states with the most executions since the early 1980s, according to the Death Penalty Information Center ...
Biden campaigned in 2020 on ending the federal death penalty. Today's White House statement said Biden will take "more steps in the weeks ahead" and "continue reviewing clemency petitions to ...
German Democratic Republic (country which ceased to exist in 1990 and all of its territory joined the Federal Republic of Germany) abolished the death penalty in 1987, the last execution was held in 1981. Greece: 1972 2004 [360] [361