News tagged with animals

Related topics: plants , species , birds , offspring , insects

Females ignored in basic medical research

A new study from Northwestern Medicine has found that surgical researchers rarely use female animals or female cells in their published studies—despite a huge body of evidence showing that sex differences can play a crucial ...

Aug 28, 2014
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Viral relics show cancer's 'footprint' on our evolution

Viral relics show cancer's 'footprint' on our evolution Cancer has left its 'footprint' on our evolution, according to a study which examined how the relics of ancient viruses are preserved in the genomes of 38 mammal species.

Jul 17, 2014
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Animal

Animals are a major group of mostly multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. Most animals are also heterotrophs, meaning they must ingest other organisms for sustenance.

Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago.

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