A Poisonous Frog Hiding In Plain Sight
The poison dart frog may be the world’s most poisonous animal on earth, but the bold warning of its skin also doubles as camouflage.
Humanitarianism
humanitarianism is an ethic of kindness, benevolence, and sympathy extended universally and impartially to all human beings. Humanitarianism has been an evolving concept historically but universality...
Humanitarianism - Wikipedia
Altruism in animals
In biology, altruism refers to behaviour by an individual that increases the fitness of another individual while decreasing the fitness of the actor. Altruism in this sense is different from the philo...
Altruism in animals - Wikipedia
Origin of avian flight
Around 350 BCE, Aristotle and other philosophers of the time were attempting to explain the aerodynamics of avian flight. Even after the discovery of the ancestral bird Archaeopteryx, over 150 years ...
Altruism
Altruism or selflessness is the principle or practice of concern for the welfare of others. It is a traditional virtue in many cultures and a core aspect of various religious traditions and secular wo...
Morpho
The morpho butterfly may be one of over 29 accepted species and 147 accepted subspecies of butterflies in the genus Morpho. They are Neotropical butterflies found mostly in South America as well as Me...
Morpho - Wikipedia
Heroes
Heroes may refer to:
The Colours of Animals
The Colours of Animals is a zoology book written in 1890 by Sir Edward Bagnall Poulton (1856–1943). It was the first substantial textbook to argue the case for Darwinian selection applying to all aspe...
The Colours of Animals - Wikipedia
Volunteering
Volunteering is generally considered an altruistic activity and is intended to promote goodness or improve human quality of life. In return, this activity can produce a feeling of self-worth and respe...
Volunteering - Wikipedia
Falling on a grenade
Falling on a grenade refers to the deliberate act of using one's body to cover a live time-fused hand grenade, absorbing the explosion and fragmentation in an effort to save the lives of others nearby...
Evolution of color vision in primates
The evolution of color vision in primates is unique compared to most eutherian mammals. A remote vertebrate ancestor of primates possessed tetrachromacy, but nocturnal, warm-blooded, mammalian ancesto...
Evolution of color vision in primates - Wikipedia
Climatic adaptation
Climate adaptation refers to specific adaptations in a living organism that develop in response to changes in climate and habitat. Such adaptations could include physical changes, such as skin or fur ...
Evolution of color vision
Color vision, a proximate adaptation of the vision sensory modality, allows for the discrimination of light based on its wavelength components.
Color vision requires a number of opsin molecules wi...
Evolution of flagella
The evolution of flagella is of great interest to biologists because the three known varieties of flagella (eukaryotic, bacterial, and archaeal) each represent a sophisticated cellular structure that ...
Aposematism
Aposematism (from Greek ἀπό apo away, σ̑ημα sema sign, coined by Edward Bagnall Poulton), perhaps most commonly known in the context of warning coloration, describes a family of antipredator adaptatio...
Aposematism - 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
Type three secretion system
Type three secretion system (often written Type III secretion system and abbreviated TTSS or T3SS, also called Injectisome or Injectosome) is a protein appendage found in several Gram-negative bacteri...
Type three secretion system - Wikipedia
Evolution of biological complexity
The evolution of biological complexity is one important outcome of the process of evolution. Evolution has produced some remarkably complex organisms - although the actual level of complexity is very ...
Body plan
A body plan (also written bodyplan), Bauplan (German plural Baupläne), or ground plan is "an assemblage of morphological features shared among many members of a phylum-level group". The vertebrate bod...
Body plan - Wikipedia
Warm-glow giving
Warm-glow giving is an economic phenomenon described by James Andreoni in 1989 that attempts to explain why people give to charity by proposing that people engage in impure altruism. Instead of being ...