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The aquatic lifestyle of cetaceans first began in the Indian subcontinent from even-toed ungulates 50 million years ago, with this initial stage lasting approximately 4-15 million years. [8] Archaeoceti is an extinct parvorder of Cetacea containing ancient whales.
Cetaceans are famous for their high intelligence, ... Whales' direct lineage began in the early Eocene, around 55.8 million years ago, with early artiodactyls. [73]
Prehistoric warfare refers to war that occurred between societies without recorded history.. The existence—and the definition—of war in humanity's hypothetical state of nature has been a controversial topic in the history of ideas at least since Thomas Hobbes in Leviathan (1651) argued a "war of all against all", a view directly challenged by Jean-Jacques Rousseau in a Discourse on ...
Archaeoceti ("ancient whales"), or Zeuglodontes in older literature, is a paraphyletic group of primitive cetaceans that lived from the Early Eocene to the late Oligocene 1] Representing the earliest cetacean radiation , they include the initial amphibious stages in cetacean evolution , thus are the ancestors of both modern cetacean suborders ...
The government officially sanctioned the camps in 1915, and the Rainbow Conservation Camp became the first in 1946 because of World War II firefighter shortages.
Porphyrios is mentioned in the writings of the 6th-century Byzantine historian Procopius, both in the History of the Wars (VII 29) [7] and The Secret History. [4] According to Procopius, Porphyrios measured 13.7 meters (45 ft) long and 4.6 meters (15 ft) wide. [1]
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A researcher fires a biopsy dart at an orca.The dart will remove a small piece of the whale's skin and bounce harmlessly off the animal. Cetology (from Greek κῆτος, kētos, "whale"; and -λογία, -logia) or whalelore (also known as whaleology) is the branch of marine mammal science that studies the approximately eighty species of whales, dolphins, and porpoises in the scientific ...