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The earliest animals were marine invertebrates, that is, vertebrates came later. Animals are multicellular eukaryotes, [note 1] and are distinguished from plants, algae, and fungi by lacking cell walls. [1]
Lots of Silurian and Devonian scorpions were previously thought to be gill-breathing, hence the idea that scorpions were primitively aquatic and evolved air-breathing book lungs later on. [107] However subsequent studies reveal most of them lacking reliable evidence for an aquatic lifestyle, [ 108 ] while exceptional aquatic taxa (e.g ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 December 2024. Self propulsion of a person through water This article is about standard human swimming. For competitive swimming, see Swimming (sport). For animal swimming, see Aquatic locomotion. For other uses, see Swimming (disambiguation) and Swimmer (disambiguation). A competitive swimmer ...
(The Center Square) – Wisconsin’s Department of Public Instruction is receiving $10 million in federal funds over a five-year period for what it calls the recruitment, retention, and ...
Christmas cheer is in the air, and dogs across the world are already in the holiday spirit.. Pictures captured of man's best friend around the globe include everything from dogs dressed as Santa ...
The Caspian Sea is the world's largest inland body of water, described as the world's largest lake and usually referred to as a full-fledged sea. [2] [3] [4] An endorheic basin, it lies between Europe and Asia: east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau.
(Cold air, though uncomfortable at first, can also be good for your mood, she said.) “You’re feeling this way because you are human,” she said. Setting boundaries and expectations.
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.