Cosma / Communication / Knowledge / Realm / Terrestrial / Life /Animal / Mammal / Dolphin
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Introduction1
How smart are dolphins? (Lori Marino, TED-Ed)
TED-Ed (YouTube Channel)
Dictionary
dolphin : any of various small marine toothed whales (family Delphinidae) with the snout more or less elongated into a beak and the neck vertebrae partially fused
Note: While not closely related, dolphins and porpoises share a physical resemblance that often leads to misidentification. Dolphins typically have cone-shaped teeth, curved dorsal fins, and elongated beaks with large mouths, while porpoises have flat, spade-shaped teeth, triangular dorsal fins, and shortened beaks with smaller mouths. — Merriam-Webster See also OneLook
Encyclopedia
Dolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Their closest living relatives are the hippopotamuses, having diverged about 40 million years ago. — Wikipedia
Dolphin (Encyclopædia Britannica)
Cetacean Fact Sheets (American Cetacean Society)
Dolphins (One Zoom)
Dolphin (WolframAlpha)
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Adventures
Explore related posts on Cosma …
- Watchable Whales - A popular tourist activity in Boston is whale watching (Trip Advisor). That is because it’s only a short 25 mile trip out to Stellwagen Bank National Marine Sanctuary (Wikipedia). Stellwagen Bank hosts several different species of large whales, including humpbacks, finbacks, minkes, pilot whales and right whales. If you’ve never seen a whale in person, … Continue reading Watchable Whales
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Inspiration
Note: This is a 360° Video — press and hold to explore it!
Wildlife Protection Solutions (YouTube Channel)
Wildlife Protection Solutions (Official Website)
Talks about Dolphins (TED: Ideas Worth Spreading)
Articles about Dolphins (Big Think)
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Innovation
Science
Cetology is the branch of marine mammal science that studies the approximately eighty species of whales, dolphins, and porpoises in the scientific order Cetacea. — Wikipedia
Solidifying the Dolphin Family Tree (Devin Reese, Smithsonian Ocean)
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Preservation
Conservation
Conservation (American Cetacean Society)
History
Natural History of Dolphins (Dolphin Research Center)
Dolphin (World History Encyclopedia)
Library
DDC: 599.53 Dolphins (Library Thing)
Subject: Dolphins (Library Thing)
Subject: Dolphins (Open Library)
LCC: QL 737.C432 TERM (UPenn Online Books)
Subject: Dolphins (UPenn Online Books)
LCC: QL 737.C432 TERM (Library of Congress)
Subject: Dolphins (Library of Congress)
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Participation
Education
Cetacean Curriculum (American Cetacean Society)
MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources
Community
Occupation
Cetologists , or those who practice cetology, seek to understand and explain cetacean evolution, distribution, morphology, behavior, community dynamics, and other topics. — Wikipedia
How to Become a Marine Mammal Scientist (The Society for Marine Mammology)
Careers in Mammalogy (American Society of Mammalogists)
Organization
American Society of Mammalogists
The Mammal Society
News
Marine Mammal Science (Society for Marine Mammalogy)
Mammal Review (The Mammal Society)
Journal of Mammalogy (American Society of Mammalogists)
Mammalian Species (American Society of Mammalogists)
TERM (EurekaAlert, American Association for the Advancement of Science)
Dolphins (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Dolphins (JSTOR)
Dolphins (Science Daily)
Dolphins (Science News)
Dolphins (Phys.org)
Dolphins (NPR Archives)
Government
Dolphins & Porpoises (Northeast Fisheries Science Center, NOAA Fisheries)
More News …
Dolphins and Whales News -- ScienceDaily Whales and dolphins. Whale songs, beaching, endangered status -- current research news on all cetaceans.
- Scientists were wrong about this strange mammal...on September 28, 2026 at 12:25 pm
A beautifully preserved fossil from Mongolia’s Gobi Desert has solved a mystery that puzzled paleontologists for nearly 40 years. Tamirkhan balcarceli shows that zhelestids were not early relatives of modern placental mammals, despite having teeth that seemed to suggest they were. Instead, the rabbit-like animal belonged to a separate lineage of small Cretaceous mammals.
- Humpback whale mother may have mourned her dead...on September 22, 2026 at 1:05 pm
Researchers observed a humpback whale mother staying beside her presumed stillborn calf for hours and possibly days off Australia’s Gold Coast. She maintained eye contact and remained close to the calf in behavior resembling caregiving and nurturing. Scientists say the rare observation may provide new insight into grief, maternal attachment, and emotional complexity in humpback whales.
- 324-million-year-old fossil reveals how insects...on August 27, 2026 at 7:22 am
Ancient fossils suggest insects conquered land through a long amphibious phase rather than making an abrupt jump from water to dry ground. A newly identified 324-million-year-old species still carried paddle-like abdominal limbs, revealing an evolutionary bridge between aquatic ancestors and modern six-legged insects.
- Forget the sperm race: Fertilization may depend...on August 6, 2026 at 6:25 am
Millions of sperm do not always compete alone—some species send them into action as coordinated teams. A sweeping evolutionary study found that this cooperation is widespread among arthropods and has repeatedly emerged and vanished over hundreds of millions of years. The discovery challenges the classic “fastest sperm wins” story and could influence future fertility research and pest-control strategies.
- Orcas filmed smashing giant sunfish into...on July 23, 2026 at 1:55 pm
Researchers in the Gulf of California have documented a dramatic orca behavior never described before. In two separate encounters, one orca gripped a dead sunfish by the fin while another charged into it at high speed, blasting the carcass into thousands of pieces.
Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.
- Extreme drought and heat from the last El Niño...on October 7, 2026 at 1:00 pm
During the 2023–2024 El Niño, about 75% of the world's tropical forest areas experienced at least six months of unprecedented simultaneous drought and heat. According to a study published in Earth's Future, this scenario offers more than just a snapshot of an extreme event; it offers a preview of the "new normal" for the next two decades if greenhouse gas emissions are not reduced.
- Tracking the fin whale and the sperm whale in the...on September 30, 2026 at 9:20 pm
Where are the great marine animals of the Mediterranean, such as the fin whale, the sperm whale or the bottlenose dolphin? How does their distribution change over a few weeks? All indications suggest that these species shift between marine areas in a remarkably short time and over relatively small spatial scales. Some species, such as the striped dolphin, maintain a relatively stable presence in certain areas, while others, such as the fin whale, move and concentrate in different areas from one […]
- Uncovering species–specific chemical...on September 28, 2026 at 9:40 pm
Chemicals affect biological species in different ways, posing a major challenge for assessing environmental chemical risks. However, the mechanisms behind these differences have remained largely unknown.
- Finding homes for whales and dolphins when parks...on September 27, 2026 at 6:00 pm
When Marineland Canada in Niagara Falls, Ontario, closed in September 2024, it had no regular income to support the care of the 30 belugas and four dolphins housed there. To ensure their welfare, the Association of Zoos and Aquariums led an international effort to relocate the animals to the United States and Spain.
- Queasy plesiosaurs swam to shore to vomit,...on September 22, 2026 at 11:00 pm
Plesiosaurs swam into river deltas to vomit up shells and other indigestible elements of their marine meals, suggests new research published by Cambridge University Press. The behavior resembles that of today's fur seals and marine crocodiles.
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Related
Here are links to pages about closely related subjects.
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
Animal
Invertebrate
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Vertebrate
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
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Notes
1. The resources on this page are are organized by a classification scheme developed exclusively for Cosma.




