Cosma / Communication / Knowledge / Realm / Terrestrial / Life


ExSciEd (YouTube Channel)


life : an organismic state characterized by capacity for metabolism, growth, reaction to stimuli, and reproduction — Merriam-Webster   See also   OneLook


Life is a characteristic distinguishing physical entities having biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased, or because they never had such functions and are classified as inanimate. Various forms of life exist, such as plants, animals, fungi, protists, archaea, and bacteria. The criteria can at times be ambiguous and may or may not define viruses, viroids, or potential artificial life as “living”. Biology is the primary science concerned with the study of life, although many other sciences are involved.

The definition of life is controversial. The current definition is that organisms maintain homeostasis, are composed of cells, undergo metabolism, can grow, adapt to their environment, respond to stimuli, and reproduce. However, many other biological definitions have been proposed, and there are some borderline cases of life, such as viruses. Properties common to all organisms include the need for certain core chemical elements to sustain biochemical functions. — Wikipedia

Life (Encyclopædia Britannica)
Life (Biology Online)
Life on Earth (Tree of Life)
All Life, Scientific Name: Biota (One Zoom)
Biota (Catalogue of Life)
Life (WolframAlpha)

Biosphere also known as the ecosphere, is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth, a closed system (apart from solar and cosmic radiation and heat from the interior of the Earth), and largely self-regulating. By the most general biophysiological definition, the biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, cryosphere, hydrosphere, and atmosphere. — Wikipedia

Harmony Square (YouTube Channel)

Biosphere (Encyclopædia Britannica)



Gaia’s Greenhouse

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Gaia's Greenhouse SL



Articles about Life (Big Think)




Life Sciences are the branches of science that involve the scientific study of life – such as microorganisms, plants, and animals including human beings. This is one of the two major branches of natural science, the other being physical science, which is concerned with non-living matter. Biology is the overall natural science that studies life, with the other life sciences as its sub-disciplines. Some life sciences focus on a specific type of organism. For example, zoology is the study of animals, while botany is the study of plants. Other life sciences focus on aspects common to all or many life forms, such as anatomy and genetics. Some focus on the micro-scale (e.g. molecular biology, biochemistry) other on larger scales (e.g. cytology, immunology, ethology, pharmacy, ecology). — Wikipedia

Life Sciences (Wolfram Alpha)

Biology is the scientific study of life. Biologists study life at multiple levels of organization, from the molecular biology of a cell to the anatomy and physiology of plants and animals, and evolution of populations. Biologists also study and classify the various forms of life, from prokaryotic organisms such as archaea and bacteria to eukaryotic organisms such as protists, fungi, plants, and animals. — Wikipedia

Biology (Free Animated Education, YouTube Playlist)
Free Animated Education (Facebook)

Biology (Encyclopædia Britannica)




Biological Conceptions in Antiquity (Dictionary of the History of Ideas)
Biological Homlogies and Analogies (Dictionary of the History of Ideas)
Biological Models (Dictionary of the History of Ideas)
Spontaneous Generation (Dictionary of the History of Ideas)


DDC: 570 Life Sciences, Biology (Library Thing)
Subject: Life (Library Thing)
Subject: Biology (Library Thing)

Subject: Life (Open Library)
Subject: Biology (Open Library)

LCC: QH 501 Life (UPenn Online Books)
Subject: Life (UPenn Online Books)
LCC: QH 301 Biology (UPenn Online Books)
Subject: Biology (UPenn Online Books)

LCC: QH 501 Life (Library of Congress)
Subject: Life (Library of Congress)
LCC: QH 301 Biology (Library of Congress)
Subject: Biology (Library of Congress)

Subject: Life (WorldCat)
Subject: Biology (WorldCat)




Biosphere: A Big Ball of Life (Geography4Kids)
Biology Basics (Biology4Kids)

The Biology Project (University of Arizona)
Ask a Biologist (Arizona State University)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources


Introduction to Biology (Biology Corner)
AP Biology (Biology Corner)

Biology Courses (MIT OpenCourseWare)



CareerOneStop, YouTube Channel (U.S. Department of Labor, Employment and Training Administration)
CareerOneStop, Official Website (U.S. Department of Labor, Employment and Training Administration)

Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)

What’s a Biologist? (Ask a Biologist, Arizona State University)
What do Biologists Do? (Ask a Biologist, Arizona State University)
Becoming a Biologist (Ask a Biologist, Arizona State University)
Biology Careers (Ask a Biologist, Arizona State University)


International Union of Biological Sciences
American Institute of Biological Sciences
Federation of American Societies for Experimental Biology


BioScience (American Institute of Biological Sciences)
FASEB Journal (Federation of American Societies for Experimental Biology)
Quarterly Review of Biology (University of Chicago Press)
BMC Biology (BioMed Central, Springer Nature)
Biological Sciences (Nature)
Biology (EurekaAlert, American Association for the Advancement of Science)
bioRxiv: Preprint Server for Biology (Cold Spring Harbor Laboratory)
Life Sciences (Science Daily)
Life (Science News)

Life Resources (JSTOR)
Biology Resources (JSTOR)
Biological Sciences Journals and Books (JSTOR)


Animals, Plants and Other Organisms (National Academies Press)
Biology (National Academies Press)
Biology and Life Sciences (National Academies Press)


Understanding NSF Research: Biology (National Science Foundation)
Biology (United States Geological Survey)


Biology (



Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.