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  2. Gas chamber - Wikipedia

    en.wikipedia.org/wiki/Gas_chamber

    As of 2020, the last person to be executed in the gas chamber was German national Walter LaGrand, sentenced to death before 1992, who was executed in Arizona on March 3, 1999. The U.S. Court of Appeals for the Ninth Circuit had ruled that he could not be executed by gas chamber, but the decision was overturned by the United States Supreme Court ...

  3. Great Oxidation Event - Wikipedia

    en.wikipedia.org/wiki/Great_Oxidation_Event

    Oxygen, O 2, meanwhile, was present in the atmosphere at just 0.001% of its present atmospheric level. [11] [12] The Sun shone at about 70% of its current brightness 4 billion years ago, but there is strong evidence that liquid water existed on Earth at the time. A warm Earth, in spite of a faint Sun, is known as the faint young Sun paradox. [13]

  4. Geological history of oxygen - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_oxygen

    Photosynthetic prokaryotic organisms that produced O 2 as a byproduct lived long before the first build-up of free oxygen in the atmosphere, [5] perhaps as early as 3.5 billion years ago. The oxygen cyanobacteria produced would have been rapidly removed from the oceans by weathering of reducing minerals, [citation needed] most notably ferrous ...

  5. Alabama calls nitrogen execution method painless and ... - AOL

    www.aol.com/news/alabama-calls-nitrogen...

    The Alabama attorney general's office told federal appeals court judges last week that nitrogen hypoxia is "the most painless and humane method of execution known to man."

  6. Oxygen toxicity - Wikipedia

    en.wikipedia.org/wiki/Oxygen_toxicity

    Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O 2) at increased partial pressures. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes.

  7. The US has executed 23 men this year. A look at the state of ...

    www.aol.com/news/death-penalty-us-states-still...

    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 ...

  8. Capital punishment - Wikipedia

    en.wikipedia.org/wiki/Capital_punishment

    The last execution in San Marino had taken place in 1468. In Portugal, after legislative proposals in 1852 and 1863, the death penalty was abolished in 1867. The last execution in Brazil was 1876; from then on all the condemnations were commuted by the Emperor Pedro II until its abolition for civil offences and military offences in peacetime in ...

  9. List of United States Supreme Court opinions involving ...

    en.wikipedia.org/wiki/List_of_United_States...

    Florida, 458 U.S. 782 (1982) – The death penalty is unconstitutional for a person who is a minor participant in a felony and does not kill, attempt to kill, or intend to kill. Tison v. Arizona , 481 U.S. 137 (1987) – Death penalty may be imposed on a felony-murder defendant who was a major participant in the underlying felony and exhibits ...