Timeline of evolutionary history of life
This timeline of evolution of life represents the current scientific theory outlining the major events during the development of life on planet Earth. In biology, evolution is any change across succe...
Timeline of evolutionary history of life - Wikipedia
Scientists Find Evidence for Alternate Theory of How Life Arose
A new study led by scientists at The Scripps Research Institute (TSRI) offers a twist on a popular theory for how life on Earth began about...
A Newly Made RNA Strand Bolsters Ideas About How Life On Earth Began
RNA molecule is able to synthesize other RNAs, a feat believed central to the origin of life
5 Gross And Amazing Ways Animals Deliver Sperm
One worm lives inside the female and ejaculates through the top of her head. In some deep-sea anglerfish species, like the needlebeard seadevil, the tiny male bites into the female, who is often 10 ti...
RNA world hypothesis
The RNA world hypothesis proposes that self-replicating ribonucleic acid (RNA) molecules were precursors to all current life on Earth. It is generally accepted that current life on Earth descends from...
RNA world hypothesis - Wikipedia
Last universal ancestor
The last universal ancestor (LUA), also called the last universal common ancestor (LUCA), cenancestor, or progenote, is the most recent organism from which all organisms now living on Earth have comm...
Last universal ancestor - Wikipedia
Great Oxygenation Event
The Great Oxygenation Event (GOE), also called the Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, Oxygen Revolution, or Great Oxidation, was the biologically induced appearance of dioxygen (O2)...
Great Oxygenation Event - Wikipedia
Evolution of sexual reproduction
The evolution of sexual reproduction describes how sexually reproducing eukaryotic organisms (animals, plants and fungi) evolved from a common ancestor that was a single celled eukaryotic species. Man...
Ediacara biota
The Ediacara (/ˌiːdiˈækərə/; formerly Vendian) biota consisted of enigmatic tubular and frond-shaped, mostly sessile organisms that lived during the Ediacaran Period (ca. 635–542 Ma). Trace fossils of...
Ediacara biota - Wikipedia
Cambrian explosion
The Cambrian explosion, or less commonly Cambrian radiation, was the relatively short evolutionary event, beginning around 542 million years ago in the Cambrian Period, during which most major animal ...
Cambrian explosion - Wikipedia
Timeline of plant evolution
This article attempts to place key plant innovations in a geological context. It concerns itself only with novel adaptations and events that had a major ecological significance, not those that are of...
Timeline of plant evolution - Wikipedia
Timeline of human evolution
The timeline of human evolution outlines the major events in the development of the human species, and the evolution of humans' ancestors. It includes a brief explanation of some animals, species or g...
Neanderthal extinction hypotheses
Neanderthal extinction refers to the sudden disappearance of Neanderthals during a time when modern humans began to emerge in Eurasia. Since the discovery of Neanderthal remains, both the Neanderthal...
Neanderthal extinction hypotheses - Wikipedia
Scientists Find Evidence for Alternate Theory of How Life Arose
A new study led by scientists at The Scripps Research Institute (TSRI) offers a twist on a popular theory for how life on Earth began about...
5 Gross And Amazing Ways Animals Deliver Sperm
One worm lives inside the female and ejaculates through the top of her head. In some deep-sea anglerfish species, like the needlebeard seadevil, the tiny male bites into the female, who is often 10 ti...
Early Cambrian geochemical fluctuations
The start of the Cambrian period is marked by fluctuations in a number of geochemical records, including Strontium, Sulfur and Carbon isotopic excursions. While these anomalies are difficult to inter...
Ordovician radiation
The Great Ordovician Biodiversification Event (GOBE or Ordovician radiation) was a diversification of animal life throughout the Ordovician period, just 40 million years after the Cambrian explosion, ...
Homo antecessor
Homo antecessor is an extinct human species (or subspecies) dating from 800,000 to 1.2 million years ago, that was discovered by Eudald Carbonell, Juan Luis Arsuaga and J. M. Bermúdez de Castro. H. a...
Homo antecessor - Wikipedia
Cambrian substrate revolution
The "Cambrian substrate revolution" or "Agronomic revolution", evidenced in trace fossils, is the diversification of animal burrowing during the early Cambrian period. Before this "widening of the beh...
Cambrian substrate revolution - Wikipedia
Homo heidelbergensis
Homo heidelbergensis — sometimes called Homo rhodesiensis — is an extinct species of the genus Homo which lived in Africa, Europe and western Asia during about 0.6 to 0.3 million years ago. First disc...
Homo heidelbergensis - Wikipedia
Homo sapiens
Homo sapiens (Latin: "wise man") is the binomial nomenclature (also known as the scientific name) for the human species. Homo is the human genus, which also includes Neanderthals and many other extinc...
Homo habilis
Homo habilis is a species of the Hominini tribe, during the Gelasian and early Calabrian stages of the Pleistocene period, between roughly 2.1 and 1.5 million years ago.
There has been scholarly...
Homo habilis - Wikipedia
End-Ediacaran extinction
Evidence suggesting that a mass extinction occurred at the end of the Ediacaran period, 542 million years ago, includes:
During the Ediacaran period, two main groups of organisms are found in the ...
Chimpanzee–human last common ancestor
The chimpanzee–human last common ancestor (CHLCA, CLCA, or C/H LCA) is the last species that the genera Homo and Pan (i.e. humans on one hand and bonobos and common chimpanzees on the other) share as...
Mitochondrial Eve
In the field of human genetics, the name Mitochondrial Eve refers to the matrilineal most recent common ancestor (MRCA), in a direct, unbroken, maternal line, of all currently living anatomically mode...
Mitochondrial Eve - Wikipedia
Homo rudolfensis
Homo rudolfensis (also Australopithecus rudolfensis) is an extinct species of the Hominini tribe known only through a handful of representative fossils, the first of which was discovered by Bernard Ng...
Homo rudolfensis - Wikipedia
Kenyanthropus
Kenyanthropus platyops is a 3.2 to 3.5-million-year-old (Pliocene) hominin fossil discovered in Lake Turkana, Kenya in 1999 by Justus Erus, who was part of Meave Leakey's team.Leakey (2001) proposes...
Kenyanthropus - Wikipedia
Y-chromosomal Adam
In human genetics, Y-chromosomal most recent common ancestor (Y-MRCA; informally also known as Y-chromosomal Adam) refers to the most recent common ancestor (MRCA) from whom all currently living peopl...
Y-chromosomal Adam - Wikipedia
Spriggina
Fossils of Spriggina are known from the Ediacaran period, around 550 million years ago. The segmented organism reached about 3–5 cm in length and may have been predatory. Its bottom is covered ...
Spriggina - Wikipedia
Hominina
Homo is the genus of hominids that includes modern humans and species closely related to them. The genus is estimated to be about 2.5 million years old, emerging with the appearance of Homo habilis fr...
Hominina - Wikipedia