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c. 33.9 Ma – End of Eocene, start of Oligocene epoch. c. 35 Ma – Grasslands first appear. Glyptodonts, ground sloths, peccaries, dogs, eagles, and hawks evolve. c. 33 Ma – First thylacinid marsupials evolve. c. 30 Ma – Brontotheres go extinct. Pigs evolve. South America separates from Antarctica, becoming an island continent.
The numeric values on the International Chronostratigrahpic Chart are represented by the unit Ma (megaannum, for 'million years'). For example, 201.4 ± 0.2 Ma, the lower boundary of the Jurassic Period, is defined as 201,400,000 years old with an uncertainty of 200,000
Use the format {{Ma|Millions_of_years_ago|Suffix|error=Error|round=Degree of accuracy}} Millions_of_years_ago can take a number (don't include commas, which are added automatically), or a period name (e.g. Cambrian), in which case it will return the date the period started. Suffix is optional and defaults to "million years ago".
Cuneiform sign for ma. Because of its commonness, it has few other alphabetic uses besides, ma, m, or a; there is a Sumerogram usage for MA. Amarna letter EA 365, "Furnishing Corvée Workers", Biridiya to Pharaoh, reverse (lines 15–30, (31)). 5th line from bottom, (line 23), "LÚ-MEŠ–ma-as-sà-meš (and)". Line 25, 3rd from bottom, repeats ...
Ahnentafel style trees can be can be displayed using this template, but usually for fewer than six generations the customised ahnentafel templates are clearer (see Template:Ahnentafel/doc). There is also an ahnentafel template ({{Ahnentafel-tree}}), that is based on this one, that makes construction this tree simpler.
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Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.