Search results
Results From The WOW.Com Content Network
The extinction symbol with an X-shaped pictogram of an hourglass.The letter X stands for the first syllable of the word "extinction" Flag with the extinction symbol. The extinction symbol represents the threat of holocene extinction on Earth; a circle represents the planet and a stylised hourglass is a warning that time is running out for many species.
English: The symbol represents extinction. The circle signifies the planet, while the hourglass inside serves as a warning that time is rapidly running out for many species. The circle signifies the planet, while the hourglass inside serves as a warning that time is rapidly running out for many species.
The symbol is also used to indicate death (of people) or extinction (of species or languages). [2] It is one of the modern descendants of the obelus, a mark used historically by scholars as a critical or highlighting indicator in manuscripts. In older texts, it is called an obelisk. [3] [a]
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.
The largest extinction was the Kellwasser Event (Frasnian-Famennian, or F-F, 372 Ma), an extinction event at the end of the Frasnian, about midway through the Late Devonian. This extinction annihilated coral reefs and numerous tropical benthic (seabed-living) animals such as jawless fish, brachiopods, and trilobites.
A word list was made in 1931. after 1931: Tuxinawa: Panoan: Acre, Brazil: A word list was made in 1931. by 1931: Aka-Bea: Andamanese: Andaman Islands, India [195] by 1931: Oko-Juwoi: Andamanese: Andaman Islands, India [195] after 1930: Sensi: Panoan: right bank of Ucayali River, Peru: A word list was created by Günter Tessmann in 1930. c. 1930 ...
The team analyzed combined extinction patterns using a new clumped isotope temperature record from a hiatus-free, expanded K–Pg boundary section. They documented a 7.8±3.3 °C warming synchronous with the onset of Deccan Traps volcanism and a second, smaller warming at the time of meteorite impact.
Extinction is the termination of a taxon by the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recover. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.