Adaptation
In biology, an adaptation, also called an adaptive trait, is a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection. Ada...
How Big Genitals Can Lead to Extinction, According to Science
Having big genitals can spell evolutionary disaster, say paleobiologists
Vanishing: The Earth's 6th mass extinction
We're entering the Earth's sixth era of extinction -- and it's the first time humans are to blame.
The extinction crisis is far worse than you think
Frogs, coral, elephants -- all are on the brink. Three quarters of species could disappear. Why is this happening? CNN explores an unprecedented global crisis.
Earth 'entering new extinction phase' - US study
The Earth has entered a "new period of extinction", a study by three US universities concludes, and humans could be among the first casualties.
Earth's sixth mass extinction has begun, new study confirms
Even if humans survive the planet will never be the same again. We are currently witnessing the start of a mass extinction event the likes of which have not been seen on Earth for at least 65 million ...
Evolution Abandoned Giant Pandas After They Switched To A Bamboo Diet
A giant panda may look like a vegetarian on the outside, but it definitely looks like a carnivore on the inside. A genetic analysis of 121 samples of panda poop finds that the community of microbes li...
As Temperatures Increase, So Will Extinction Rates
For some time, scientists have watched as creatures big and small have attempted to adapt to climate change. Some have shifted their ranges while others are breeding earlier. Now, a study finds that t...
Fitness (biology)
Fitness (often denoted in population genetics models) is a central idea in evolutionary theory. It can be defined either with respect to a genotype or to a phenotype in a given environment. In either...
Fitness (biology) - Wikipedia
History of evolutionary thought
Evolutionary thought, the conception that species change over time, has roots in antiquity, in the ideas of the ancient Greeks, Romans, and Chinese as well as in medieval Islamic science. With the beg...
History of evolutionary thought - Wikipedia
Vestigiality
Vestigiality refers to genetically determined structures or attributes that have apparently lost most or all of their ancestral function in a given species, but have been retained through evolution. A...
Vestigiality - Wikipedia
Fitness landscape
In evolutionary biology, fitness landscapes or adaptive landscapes (types of Evolutionary landscapes) are used to visualize the relationship between genotypes and reproductive success. It is assumed ...
Fitness landscape - Wikipedia
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last indivi...
Extinction - Wikipedia
Co-extinction
Coextinction and cothreatened refer to the phenomena of the loss or decline of a host species resulting in the loss or endangerment of other species that depend on it, potentially leading to cascading...
Acclimatization
Acclimatization (UK also acclimatisation; US also acclimation) is the process in which an individual organism adjusts to a gradual change in its environment (such as a change in temperature, humidity,...
Teleonomy
Teleonomy is the quality of apparent purposefulness and of goal-directedness of structures and functions in living organisms that derive from their evolutionary history, from adaptation for reproducti...
Amastra cornea
Amastra cornea was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. This species was endemic to Oʻahu, and was known from around Waialu...
Jiangxia chaotoensis
Jiangxia chaotoensis is a Chinese mesonychid from the Nongshanian division of the Upper Paleocene. It may be related to the genera Pachyaena and Hessolestes.J. chaotoensis was named after the provinc...
Jiangxia chaotoensis - Wikipedia
American lion
The American lion (Panthera leo atrox or P. atrox) – also known as the North American lion, Naegele’s giant jaguar or American cave lion – is an extinct lion of the family Felidae, endemic to North Am...
American lion - Wikipedia
Rocky Mountain locust
The Rocky Mountain locust (Melanoplus spretus) is an extinct locust species that ranged through the western half of the United States and some western portions of Canada until the end of the 19th cent...
Rocky Mountain locust - Wikipedia
Pseudohelenoconcha spurca
Pseudohelenoconcha spurca is an extinct species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Endodontidae.This species was found only in Saint Helena, (an...
Mendelian inheritance
Mendelian inheritance is inheritance of biological features that follows the laws proposed by Gregor Johann Mendel in 1865 and 1866 and re-discovered in 1900. It was initially very controversial. When...
Mendelian inheritance - Wikipedia
Natural selection
Natural selection is the gradual process by which heritable biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential repr...
Natural selection - Wikipedia
Long-billed Wren (New Zealand)
The long-billed wren (Dendroscansor decurvirostris) was a species of New Zealand wren (family Acanthisittidae) endemic to the South Island of New Zealand. It was the only species in the genus Dendrosc...
Eohostimella
Eohostimella heathana is an early, probably terrestrial, "plant" known from compression fossils of Early Silurian age (Llandovery, around 440 to 430 million years ago). The chemistry of its ...
Sthenodectes
Sthenodectes is a genus of brontothere endemic to North America during the Paleogene living from 46.2—42 mya, existing for approximately 4.2 million years.
Sthenodectes was named by Gregory (1912)...
Cambrian-Ordovician extinction event
The Cambrian–Ordovician extinction event occurred approximately 488 million years ago (m.y.a.). This early Phanerozoic Eon extinction event eliminated many brachiopods and conodonts, and severely re...
Lagostomus crassus
Lagostomus crassus is an extinct species of chinchilla that was native to Peru. It is known from a single skull found in southern Peru.
Phyllospondyli
The Phyllospondyli is a now abandoned term for a series of small, poorly ossified fossils of labyrinthodont amphibians from the Paleozoic. The groups was proposed as an order on the basis if their ver...
Phyllospondyli - Wikipedia
Leptotragulus
Leptotragulus is a small extinct genus of Artiodactyla, of the family Protoceratidae, endemic to North America from the Eocene epoch (Uintan to Chadronian stage) 40.2—33.9 Ma, existing for approximate...
Leptotragulus - Wikipedia
Trigonoscuta rossi
Trigonoscuta rossi was a species of beetle in family Curculionidae. It was endemic to the United States.