Search results
Results from the WOW.Com Content Network
Odontoceti (toothed whales, dolphins, and porpoises) Superfamily Delphinoidea (dolphins, arctic whales, porpoises, and relatives) Family Delphinidae, 38 species (dolphins, killer whales, and relatives) Family Monodontidae, 2 species (beluga and narwhal) Family Phocoenidae, 6 species ; Superfamily Physeteroidea (sperm whales)
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 February 2025. Miss Baker, a squirrel monkey, rode a Jupiter IRBM (scale model of rocket shown) into space in 1959. Landmarks for animals in space 1947: First animals in space (fruit flies) 1949: First primate and first mammal in space 1950: First mouse in space 1951: First dogs in space 1957: First ...
Species of the infraorder Cetacea A phylogenetic tree showing the relationships among cetacean families. [1]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]
This made it possible for whales to move around with the vertical tail hitting the water. The front legs transformed into flippers, costing them their mobility on land. [82] One of the oldest members of ancient cetaceans (Archaeoceti) is Pakicetus from the Middle Eocene of Pakistan. This is an animal the size of a wolf, whose skeleton is known ...
The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, the even-toed ungulates. The earliest cetaceans were still hoofed mammals. These early cetaceans became gradually better adapted for swimming than for walking on land, finally evolving into fully marine cetaceans.
In 2003, McGowan and Motani published the first modern textbook on the Ichthyosauria and their closest relatives. [36] Two jawbones of gigantic ichthyosaur were discovered in 2016 [37] and 2020 [38] [39] in Lilstock and Somerset respectively, UK. Simple scaling would suggest that this ichthyosaur has an estimated total length of up to 26 meters ...
There were five marine mammal teams, each purposed for one of the three tasks: MK4 (dolphins), MK5 (sea lions), MK6 (dolphins and sea lions), MK7 (dolphins) and MK8 (dolphins); MK is short for mark. The dolphin teams were trained to detect and mark mines either attached to the seafloor or floating in the water column, because dolphins can use ...
c. 560 BCE – Anaximander is arguably the first to conceive a mechanical model of the world, although highly inaccurate: a cylindrical Earth [11] floats freely in space surrounded by three concentric wheels turning at different distances: the closest for the stars and planets, the second for the Moon and the farthest for the Sun, all conceived ...