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  2. Timeline of the evolutionary history of life - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the...

    The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes. Researchers have identified five other major extinction events in Earth's history, with estimated losses below: [11] End Ordovician: 440 million years ago, 86% of all species lost, including graptolites

  3. Extinction event - Wikipedia

    en.wikipedia.org/wiki/Extinction_event

    An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth. Such an event is identified by a sharp fall in the diversity and abundance of multicellular organisms .

  4. What is a mass extinction, and why do scientists think we’re ...

    www.aol.com/brief-history-end-world-every...

    A growing number of scientists believe a sixth mass extinction event of a magnitude equal to the prior five has been unfolding for the past 10,000 years as humans have made their mark around the ...

  5. Christian liturgy - Wikipedia

    en.wikipedia.org/wiki/Christian_liturgy

    The Tridentine Mass (1570–1969), the 1962 version of which is still permitted as an extraordinary form of the Roman Rite as confirmed by Summorum Pontificum it is the same rite as the current Mass of Paul VI, just the older version; The Mass of Paul VI, since 1970 the ordinary form of the Roman Rite (1970–present)

  6. BBC Bitesize - Wikipedia

    en.wikipedia.org/wiki/BBC_Bitesize

    GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.

  7. Pre-Tridentine Mass - Wikipedia

    en.wikipedia.org/wiki/Pre-Tridentine_Mass

    The earliest surviving account of the celebration of the Eucharist or the Mass in Rome is that of Saint Justin Martyr (died c. 165), in chapter 67 of his First Apology: [2]. On the day called Sunday, all who live in cities or in the country gather together to one place, and the memoirs of the apostles or the writings of the prophets are read, as long as time permits; then, when the reader has ...

  8. Tridentine Mass - Wikipedia

    en.wikipedia.org/wiki/Tridentine_Mass

    The Tridentine Mass, [1] also known as the Extraordinary Form of the Roman Rite [2] or usus antiquior (more ancient usage), or the Traditional Latin Mass [3] [4] or the Traditional Rite [5] is the liturgy in the Roman Missal of the Catholic Church codified in 1570 and published thereafter with amendments up to 1962.

  9. Cretaceous–Paleogene extinction event - Wikipedia

    en.wikipedia.org/wiki/Cretaceous–Paleogene...

    The Cretaceous–Paleogene (K–Pg) extinction event, [a] also known as the K–T extinction, [b] was the mass extinction of three-quarters of the plant and animal species on Earth [2] [3] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.

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