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

Animal mummies unwrapped with hi-res 3-D X-rays

Three mummified animals from ancient Egypt have been digitally unwrapped and dissected by researchers, using high-resolution 3-D scans that give unprecedented detail about the animals' lives—and deaths—over 2000 years ...

Human footprints dating back 120,000 years found in Saudi Arabia

Around 120,000 years ago in what is now northern Saudi Arabia, a small band of homo sapiens stopped to drink and forage at a shallow lake that was also frequented by camels, buffalo and elephants bigger than any species seen ...

Chaotic 'Lévy walks' are a good strategy for animals

A paper published in the Proceedings of the National Academy of Science (PNAS) explains the advantage that animals have of using a specific type of chaotic type of movement called a "Lévy walk,' and how this type of behavior ...

Bringing new energy to mitochondria research

Tiny mitochondria in our cells turn oxygen and nutrients into usable energy in a process called respiration. This process is essential for powering our cells, and yet in spite of its importance many of the finer details of ...

Migration shapes patterns of disease transmission

Long-distance animal migrations can trigger relapse of dormant infections, influencing when and where infection risk peaks, according to a new paper in Proceedings of the Royal Society B. The findings demonstrate that relapse ...

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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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