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Timeline of Whale Evolution - Smithsonian Ocean Portal; Cetacean Paleobiology – University of Bristol; BBC: Whale's evolution; BBC: Whale Evolution – The Fossil Evidence; Hooking Leviathan by Its Past by Stephen Jay Gould; Research on the Origin and Early Evolution of Whales (Cetacea), Gingerich, P.D., University of Michigan
Odontocetes are known as toothed whales; they have teeth and only one blowhole. They rely on their well-developed sonar to find their way in the water. Toothed whales send out ultrasonic clicks using the melon. Sound waves travel through the water. Upon striking an object in the water, the sound waves bounce back at the whale.
The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
The sound waves of a fin whale song is loud enough to penetrate Earth’s crust and assist with mapping the ocean floor, a new study has found. Singing fin whales can help map ocean floor: study ...
Oceanography (from Ancient Greek ὠκεανός (ōkeanós) 'ocean' and γραφή (graphḗ) 'writing'), also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology.
[15] [16] The Moon's gravitational pull stabilised Earth's fluctuating axis of rotation, setting up regular climatic conditions favoring abiogenesis. [17] 4404 Ma Evidence of the first liquid water on Earth which were found in the oldest known zircon crystals. [18] 4280–3770 Ma Earliest possible appearance of life on Earth. [19] [20] [21] [22]
The whale's scientific name is Eubalaena glacialis, which means "good, or true, whale of the ice". The cladogram is a tool for visualizing and comparing the evolutionary relationships between taxa. The point where a node branches off is analogous to an evolutionary branching – the diagram can be read left-to-right, much like a timeline.
When a large marine mammal like a whale dies, its body drifts to the ocean floor in a process known as whale fall. For more than a decade, a succession of sea creatures will live off of the whale ...