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...
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
Small shelly fauna
The small shelly fauna or small shelly fossils, abbreviated to SSF, are mineralized fossils, many only a few millimetres long, with a nearly continuous record from the latest stages of the Ediacaran t...
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
Evolution of the eye
The evolution of the eye has been a subject of significant study, as a distinctive example of a homologous organ present in a wide variety of taxa. Complex, image-forming eyes evolved independently so...
Evolution of the eye - 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
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...
Orsten
The Late Series 3, Stage 4 to Furongian (Upper Cambrian) Orsten fauna includes fossilized organisms preserved in Orsten lagerstätten, notably at Kinnekulle and on the island of Öland, all in Sweden.T...
Orsten - Wikipedia
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
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
Homo erectus
Homo erectus (meaning "upright man," from the Latin ērigere, "to put up, set upright") is an extinct species of hominin that lived throughout most of the Pleistocene, with the earliest first fossil e...
Homo erectus - Wikipedia
Hominidae
The Hominidae (/hɒˈmɪnɨdiː/), also known as great apes, form a taxonomic family of primates, including four extant genera: the chimpanzees (Pan) with 2 species; gorillas (Gorilla) with 2 species; huma...
Hominidae - Wikipedia
Muller's ratchet
In evolutionary genetics, Muller's ratchet (named after Hermann Joseph Muller, by analogy with a ratchet effect) is the process by which the genomes of an asexual population accumulate deleterious mut...
Muller's ratchet - Wikipedia
Discredited hypotheses for the Cambrian explosion
As our understanding of the events of the Cambrian becomes clearer, data has accumulated to make some postulated causes for the Cambrian explosion look improbable. Some examples are the evolution of h...
Discredited hypotheses for the Cambrian explosion - Wikipedia
Ardipithecus
Ardipithecus is a genus of an extinct hominine which lived during Late Miocene and Early Pliocene in Afar Depression, Ethiopia. Originally described as one of the earliest ancestors of humans after th...
Ardipithecus - Wikipedia
Cloudinid
The Cloudinids, an early metazoan family containing the genus Cloudina, lived in the late Ediacaran period and became extinct at the base of the Cambrian. They formed millimetre-scale conical fossils ...
Cloudinid - Wikipedia
Snowball Earth
The Snowball Earth hypothesis posits that the Earth's surface became entirely or nearly entirely frozen at least once, sometime earlier than 650 Mya (million years ago). Proponents of the hypothe...
Snowball Earth - 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