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The evolution of cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to have proceeded over a period of at least 15 million years. [2] Cetaceans are fully aquatic mammals belonging to the order Artiodactyla and branched off from other artiodactyls around 50 mya.
Pakicetus (meaning 'whale from Pakistan') is an extinct genus of amphibious cetacean of the family Pakicetidae, which was endemic to Indian Subcontinent during the Ypresian (early Eocene) period, about 50 million years ago. [2]
End Ordovician: 440 million years ago, 86% of all species lost, including graptolites; Late Devonian: 375 million years ago, 75% of species lost, including most trilobites; End Permian, The Great Dying: 251 million years ago, 96% of species lost, including tabulate corals, and most trees and synapsids
Fifty years ago, members of the 1972 Dolphins team lifted fiery coach Don Shula onto their shoulders for a victory lap out of Los Angeles Memorial Coliseum, celebrating not just a Super Bowl ...
They are related to the Indohyus, an extinct chevrotain-like ungulate, from which they split approximately 48 million years ago. [10] The primitive cetaceans, or archaeocetes, first took to the sea approximately 49 million years ago and became fully aquatic by 5–10 million years later. It is unknown when river dolphins first ventured back ...
To commemorate the 50th anniversary of the Dolphins’ Perfect Season, the Miami Herald is running weekly conversations with members of the 1972 team that went 17-0.
Miami Dolphins fans have waited 50 years for a team and a season like this one as the Fins face champion Kansas City in Germany on Sunday. It could end in a Super Bowl. Meantime, enjoy this ...
The two groups are thought to have diverged around 34 million years ago (mya). Toothed whales range in size from the 1.4 m (4 ft 7 in) and 54 kg (119 lb) vaquita to the 20 m (66 ft) and 100 t (98 long tons; 110 short tons) sperm whale .