Million years ago, abbreviated as Mya, Myr (megayear) or Ma (megaannum), is a unit of time equal to 1,000,000 years (i.e. 1×106 years), or 31.556926 teraseconds...

"Million Years Ago" is a song recorded by English singer-songwriter Adele for her third studio album, 25 (2015). The song was written by Adele and Greg...

epoch of the Neogene Period and extends from about 23.03 to 5.333 million years ago (Ma). The Miocene was named by Scottish geologist Charles Lyell; the...

dinosaurs became extinct 66 million years ago, and modern humans (Homo sapiens) did not exist until about 300,000 years B.C. Ray Harryhausen, who animated...

epoch in the geologic time scale that extends from 5.333 million to 2.58 million years ago. It is the second and most recent epoch of the Neogene Period...

convention among geoscientists to use "a" specifically for "years ago" (e.g. 1 Ma for 1 million years ago), and "y" or "yr" for a one-year time period. However...

from the late Miocene epoch (from around 6.2 million years ago) into the Holocene about 4,000 years ago, and various species existed in Africa, Europe...

Quaternary period, from 2.5 million years ago to the present. Radiometric dating has yielded ages of up to 300,000 years for its rocks, and it reached...

paleontology, and genetics. Primates diverged from other mammals about 85 million years ago (mya), in the Late Cretaceous period, with their earliest fossils...

Priabonian Rupelian Chattian Aquitanian         Subdivision of the Paleogene according to the ICS, as of 2021. Vertical axis scale: millions of years ago...

which their ancestors diverged in the Carboniferous Period over 300 million years ago. Around 6,400 extant species of mammals have been described and divided...

diverged some 70 million years ago. New World monkeys and catarrhine monkeys emerged within the simians roughly 35 million years ago. Old World monkeys...

during the Devonian period (400 million years ago). Another peak occurred in the Triassic period (220–200 million years ago). Since the start of the Industrial...

long scale to the short scale. Related units are mya ("million years ago"), and byr ("billion years"). These are traditionally written in lowercase. Ga or...

to have diverged around 5.7-11 million years ago during the Late Miocene. Homo erectus appeared about 2 million years ago and spread throughout Africa (where...

the Earth, and mankind in one table. Each row is defined in years ago, that is, years before the present date, with the earliest times at the top of...

8 ± 3.6 million years ago in the Early Miocene and genetically diverged into two main genetic lineages between 19.1 and 18.5 ± 3.5 million years ago. The...

three-quarters of the plant and animal species on Earth, approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs. Most...

fossils have been found from as early as the Cambrian explosion, 539 million years ago. Cladistically (phylogenetically), vertebrates – chordates with the...

during the Carboniferous approximately 335 million years ago, and began to break apart about 200 million years ago, at the end of the Triassic and beginning...

around 3.5 million years ago, and Megantereon about 3 million years ago. Smilodon lived in North and South America from about 2.5 million years ago. This subfamily...

and 445 million years ago, the Acadian orogeny, from 410 to 380 million years ago, and the Alleghanian orogeny from 325 to 220 million years ago pushed...

3 million years ago (which created the Henry's Fork Caldera and the Mesa Falls Tuff), and the Lava Creek eruption approximately 640,000 years ago (which...

3,000 million years ago, possibly as far as 3,800 million years ago. The oldest clear evidence of life on Earth dates to 3,000 million years ago, although...

in Oceania that subsided after breaking away from Gondwana 83–79 million years ago. It has been described variously as a submerged continent, continental...

rocks dated from 580 million years ago. In addition Archaeocyathids, whose fossils are common in rocks from 530 to 490 million years ago, are now regarded...

a genus of dolichoderine ants thought to have gone extinct 15–20 million years ago was found in Paraguay, Brazil, and Argentina and redescribed in 2006...

the North American Plate (older than 539 million years), Jurassic aged limestone (201.3-145 million years ago), as well as island arc deposits and oceanic...

billion years ago to 539 million years ago) basement rocks, with the oldest zircon dated 4.1 billion years ago and the oldest rock dated 3.8 billion years ago...

Earth's geologic time scale, covering the time period from 538.8 million years ago to the present. It is the eon during which abundant animal and plant...