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- Tardigrade abstract "Tardigrades (also known as water bears or moss piglets) are water-dwelling, segmented micro-animals, with eight legs. They were first discovered by the German pastor Johann August Ephraim Goeze in 1773. The name Tardigrada (meaning "slow stepper") was given three years later by the Italian biologist Lazzaro Spallanzani. The phylum has been sighted from mountaintops to the deep sea, from tropical rain forests to the Antarctic Tardigrades can survive in extreme environments. For example, they can withstand temperatures from just above absolute zero to well above the boiling point of water (100 °C), pressures about six times greater than those found in the deepest ocean trenches, ionizing radiation at doses hundreds of times higher than the lethal dose for a human, and the vacuum of outer space. They can go without food or water for more than 10 years, drying out to the point where they are 3% or less water, only to rehydrate, forage, and reproduce.They are not considered extremophilic because they are not adapted to exploit these conditions. This means that their chances of dying increase the longer they are exposed to the extreme environments, whereas true extremophiles thrive in a physically or geochemically extreme condition that would harm most other organisms.Usually, tardigrades are about 0.5 mm (0.020 in) long when they are fully grown. They are short and plump with four pairs of legs, each with four to eight claws also known as "disks". The first three pairs of legs are directed ventrolaterally and are the primary means of locomotion, while the fourth pair is directed posteriorly on the terminal segment of the trunk and is used primarily for grasping the substrate.The animals are prevalent in mosses and lichens and feed on plant cells, algae, and small invertebrates. When collected, they may be viewed under a very-low-power microscope, making them accessible to students and amateur scientists.Tardigrades form the phylum Tardigrada, part of the superphylum Ecdysozoa. It is an ancient group, with fossils dating from 530 million years ago, in the Cambrian period.".
- Tardigrade thumbnail Waterbear.jpg?width=300.
- Tardigrade wikiPageExternalLink ap130306.html.
- Tardigrade wikiPageExternalLink tardigrade.acnatsci.org.
- Tardigrade wikiPageExternalLink tardigradehunters.weebly.com.
- Tardigrade wikiPageExternalLink find-tardigrades.html.
- Tardigrade wikiPageExternalLink tardigrades.bio.unc.edu.
- Tardigrade wikiPageExternalLink tardigradesinspace.blogspot.com.
- Tardigrade wikiPageExternalLink tree?group=Tardigrada.
- Tardigrade wikiPageExternalLink main.pl.
- Tardigrade wikiPageExternalLink 20150313-the-toughest-animals-on-earth?ocid=global_bbccom_email_16032015_earth.
- Tardigrade wikiPageExternalLink mmbearp.html.
- Tardigrade wikiPageExternalLink the-tardigrade-water-bear.html.
- Tardigrade wikiPageExternalLink behold-the-mighty-water-bear.html.
- Tardigrade wikiPageExternalLink www.tardigrada.net.
- Tardigrade wikiPageExternalLink www.tardires.ch.
- Tardigrade wikiPageExternalLink watch?v=7W194GQ6fHI.
- Tardigrade wikiPageExternalLink watch?v=qF92Ye6wl4A.
- Tardigrade wikiPageExternalLink tardigrades.
- Tardigrade wikiPageID "19817681".
- Tardigrade wikiPageLength "37221".
- Tardigrade wikiPageOutDegree "149".
- Tardigrade wikiPageRevisionID "683878784".
- Tardigrade wikiPageWikiLink Absolute_zero.
- Tardigrade wikiPageWikiLink Algae.
- Tardigrade wikiPageWikiLink Amber.
- Tardigrade wikiPageWikiLink Anatomical_terms_of_location.
- Tardigrade wikiPageWikiLink Anhydrobiosis.
- Tardigrade wikiPageWikiLink Anoxybiosis.
- Tardigrade wikiPageWikiLink Anus.
- Tardigrade wikiPageWikiLink Arthropod.
- Tardigrade wikiPageWikiLink Arthropoda.
- Tardigrade wikiPageWikiLink Atmospheric_pressure.
- Tardigrade wikiPageWikiLink Aysheaia.
- Tardigrade wikiPageWikiLink BBC.
- Tardigrade wikiPageWikiLink BIOPAN.
- Tardigrade wikiPageWikiLink Barnacle.
- Tardigrade wikiPageWikiLink Bear.
- Tardigrade wikiPageWikiLink Beorn.
- Tardigrade wikiPageWikiLink Broad_Institute.
- Tardigrade wikiPageWikiLink Burgess_Shale.
- Tardigrade wikiPageWikiLink Burgess_shale.
- Tardigrade wikiPageWikiLink Cambrian.
- Tardigrade wikiPageWikiLink Canada.
- Tardigrade wikiPageWikiLink Category:Animal_phyla.
- Tardigrade wikiPageWikiLink Category:Cambrian_first_appearances.
- Tardigrade wikiPageWikiLink Category:Cosmopolitan_animals.
- Tardigrade wikiPageWikiLink Category:Polyextremophiles.
- Tardigrade wikiPageWikiLink Category:Psychrophiles.
- Tardigrade wikiPageWikiLink Category:Radiodurants.
- Tardigrade wikiPageWikiLink Category:Space-flown_life.
- Tardigrade wikiPageWikiLink Category:Tardigrades.
- Tardigrade wikiPageWikiLink Category:Thermophiles.
- Tardigrade wikiPageWikiLink Category:Xerophiles.
- Tardigrade wikiPageWikiLink Caudal_(anatomical_term).
- Tardigrade wikiPageWikiLink Cell_(biology).
- Tardigrade wikiPageWikiLink Cell_membrane.
- Tardigrade wikiPageWikiLink Chitin.
- Tardigrade wikiPageWikiLink Circulatory_system.
- Tardigrade wikiPageWikiLink Cloaca.
- Tardigrade wikiPageWikiLink Coelom.
- Tardigrade wikiPageWikiLink Cosmos:_A_Spacetime_Odyssey.
- Tardigrade wikiPageWikiLink Cretaceous.
- Tardigrade wikiPageWikiLink Cryobiosis.
- Tardigrade wikiPageWikiLink Cryptobiosis.
- Tardigrade wikiPageWikiLink Cuticle.
- Tardigrade wikiPageWikiLink Deep_sea.
- Tardigrade wikiPageWikiLink Dehydration.
- Tardigrade wikiPageWikiLink Dune.
- Tardigrade wikiPageWikiLink Ecdysis.
- Tardigrade wikiPageWikiLink Ecdysozoa.
- Tardigrade wikiPageWikiLink Equator.
- Tardigrade wikiPageWikiLink Esophagus.
- Tardigrade wikiPageWikiLink Eutelic.
- Tardigrade wikiPageWikiLink Eutely.
- Tardigrade wikiPageWikiLink Extreme_environment.
- Tardigrade wikiPageWikiLink Extremophile.
- Tardigrade wikiPageWikiLink Extremophilic.
- Tardigrade wikiPageWikiLink Fobos-Grunt.
- Tardigrade wikiPageWikiLink Fossil.
- Tardigrade wikiPageWikiLink Fossilization.
- Tardigrade wikiPageWikiLink Foton-M.
- Tardigrade wikiPageWikiLink Fresh_water.
- Tardigrade wikiPageWikiLink Freshwater.
- Tardigrade wikiPageWikiLink Gait.
- Tardigrade wikiPageWikiLink Ganglion.
- Tardigrade wikiPageWikiLink Genome.
- Tardigrade wikiPageWikiLink Genomes.
- Tardigrade wikiPageWikiLink Gonad.
- Tardigrade wikiPageWikiLink Gray_(unit).
- Tardigrade wikiPageWikiLink Haemocoel.
- Tardigrade wikiPageWikiLink Hard_vacuum.
- Tardigrade wikiPageWikiLink Herbivore.
- Tardigrade wikiPageWikiLink Himalayas.
- Tardigrade wikiPageWikiLink Hot_spring.
- Tardigrade wikiPageWikiLink Hypertrophy.
- Tardigrade wikiPageWikiLink Hypsibiidae.
- Tardigrade wikiPageWikiLink Hypsibius_dujardini.
- Tardigrade wikiPageWikiLink Ice.
- Tardigrade wikiPageWikiLink Ionizing_radiation.