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Late Ordovician mass extinction: 445-444 Ma Global cooling and sea level drop, and/or global warming related to volcanism and anoxia [43] Cambrian: Cambrian–Ordovician extinction event: 488 Ma: Kalkarindji Large Igneous Province? [44] Dresbachian extinction event: 502 Ma: End-Botomian extinction event: 517 Ma: Precambrian: End-Ediacaran ...
Extinction: The Facts is a 2020 documentary film by the natural historian David Attenborough which aired on the BBC. It depicts the continuing sixth mass extinction, caused by humans, and the consequences of biodiversity loss and climate change. It also suggests positive action which can be taken to halt or reverse these effects.
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 .
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
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.
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.
Anoxia is the most common culprit for the second pulse of the Late Ordovician mass extinction and is connected to many other mass extinctions throughout geological time. [ 17 ] [ 52 ] It may have also had a role in the first pulse of the Late Ordovician mass extinction, [ 70 ] though support for this hypothesis is inconclusive and contradicts ...
Originating from the Roman Martyrology, traditionally read during the hour of Prime, the proclamation places the birth of Christ "within the context of salvation history." [ 1 ] Prime was suppressed as part of the liturgical reforms following Vatican II , but Pope John Paul II restored the usage of the Proclamation during the 1980 Papal ...