<h2>Animalia</h2>

<p>
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). Their body plan eventually becomes 
fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are motile, meaning they 
can move spontaneously and independently, at some point in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance.
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<p>
Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. 
Animals are divided into various sub-groups, some of which are: vertebrates (birds, mammals, amphibians, reptiles, fish); molluscs 
(clams, oysters, octopuses, squid, snails); arthropods (millipedes, centipedes, insects, spiders, scorpions, crabs, lobsters, shrimp); 
annelids (earthworms, leeches); sponges; and jellyfish.
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<p>
Contact with animals resulted in roughly 80,000 human deaths in 2013, down from 96,000 in 1990. More than 70% of these deaths were from venomous animals.
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