- Arbornautics (5/7/2018) - Traditional news stories usually cover a single subject or the straightforward relationship between two subjects. However, every once in awhile, a story comes along that crams a deceptive number of subjects and interesting relationships into a tiny space. Exploring stories like that can be an adventure. Here’s a wonderful, five minute clip from Seeker that’s … Continue reading Arbornautics
These are organized by a classification scheme developed exclusively for Cosma. More…
tardigrade : any of a phylum (Tardigrada) of microscopic invertebrates with four pairs of stout legs that live usually in water or damp moss — called also water bear — Webster
Tardigrade Tardigrades, also known colloquially as water bears, or moss piglets), are water-dwelling, eight-legged, segmented micro-animals. They were first discovered by the German zoologist Johann August Ephraim Goeze in 1773. The name Tardigrada (meaning “slow stepper”) was given three years later by the Italian biologist Lazzaro Spallanzani. They have been found everywhere: from mountain tops to the deep sea and mud volcanoes; from tropical rain forests to the Antarctic.
Tardigrades are one of the most resilient known animals, with individual species able to survive extreme conditions that would be rapidly fatal to nearly all other known life forms, such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation. About 1,150 known species form the phylum Tardigrada, a part of the superphylum Ecdysozoa. The group includes fossils dating from 530 million years ago, in the Cambrian period.
Usually, tardigrades are about 0.5 mm (0.02 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”. Tardigrades 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. — Wikipedia
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Exobiology in a box
on May 8, 2019 at 11:42 am
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Tiny 'water bears' can teach us about survival
on March 20, 2019 at 8:43 pm
Earth's ultimate survivors can weather extreme heat, cold, radiation and even the vacuum of space. Now the U.S. military hopes these tiny critters called tardigrades can teach us about true toughness. […]
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on January 28, 2019 at 11:10 am
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Expedition to Antarctica finds signs of...
on January 24, 2019 at 2:00 pm
An astonishing discovery is made by a research team including Brad Rosenheim, Ph.D., associate professor of geological oceanography in the USF College of Marine Science. He just returned from a six-week expedition to Antarctica where he lived in a tent under constant sunlight in a remote field camp roughly 500 miles from the South Pole. […]