Nature's Children
Moderator: Mike Everman
Re: Nature's Children
RARE: See what we stand to lose.
http://www.youtube.com/watch?v=jPzZ__JdlYk
http://www.youtube.com/watch?v=jPzZ__JdlYk
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Re: Nature's Children
•Collagen is piezoelectric.
"When a force is applied to [bone] collagen, a small dc electric potential is generated. The collagen conducts current mainly by negative charges. Mineral crystals of the bone (apatite) close to the collagen conduct current by positive charges. At a junction of these two types of semiconductors, current flows easily in one direction but not in the other direction …. It is thought that the forces on bones produce potentials by the piezoelectric effect and that the junctions of collagen-apatite, currents are produced that induce and control bone growth. The currents are proportional to stress (force per unit area), so increased mechanical bone stress results in increased growth." Physics of the Body (255).
http://physics.info/dielectrics/
Collagen is a composed of a triple helix, which generally consists of two identical chains (α1) and an additional chain that differs slightly in its chemical composition (α2).[23] The amino acid composition of collagen is atypical for proteins, particularly with respect to its high hydroxyproline content. The most common motifs in the amino acid sequence of collagen are Glycine-Proline-X and Glycine-X-Hydroxyproline, where X is any amino acid other than glycine, proline or hydroxyproline. The average amino acid composition for fish and mammal skin is given.[23]
http://en.wikipedia.org/wiki/Collagen
http://en.wikipedia.org/wiki/Apatite
http://en.wikipedia.org/wiki/Spaceflight_osteopenia
"When a force is applied to [bone] collagen, a small dc electric potential is generated. The collagen conducts current mainly by negative charges. Mineral crystals of the bone (apatite) close to the collagen conduct current by positive charges. At a junction of these two types of semiconductors, current flows easily in one direction but not in the other direction …. It is thought that the forces on bones produce potentials by the piezoelectric effect and that the junctions of collagen-apatite, currents are produced that induce and control bone growth. The currents are proportional to stress (force per unit area), so increased mechanical bone stress results in increased growth." Physics of the Body (255).
http://physics.info/dielectrics/
Collagen is a composed of a triple helix, which generally consists of two identical chains (α1) and an additional chain that differs slightly in its chemical composition (α2).[23] The amino acid composition of collagen is atypical for proteins, particularly with respect to its high hydroxyproline content. The most common motifs in the amino acid sequence of collagen are Glycine-Proline-X and Glycine-X-Hydroxyproline, where X is any amino acid other than glycine, proline or hydroxyproline. The average amino acid composition for fish and mammal skin is given.[23]
http://en.wikipedia.org/wiki/Collagen
http://en.wikipedia.org/wiki/Apatite
http://en.wikipedia.org/wiki/Spaceflight_osteopenia
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Re: Nature's Children
Rolling Salamanders & Caterpillars - Weird Nature - BBC animals
http://www.youtube.com/watch?v=HmLS2WXZQxU
http://www.youtube.com/watch?v=HmLS2WXZQxU
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Re: Nature's Children
16 Of The Smartest Children In History
http://www.businessinsider.com/child-pr ... 011-5?op=1
http://www.businessinsider.com/child-pr ... 011-5?op=1
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Re: Nature's Children
Doodling in Math: Spirals, Fibonacci, and Being a Plant [1 of 3]
http://www.youtube.com/watch?v=ahXIMUkS ... e=youtu.be
Part 2: http://youtu.be/lOIP_Z_-0Hs
Interesting about the magnet experiment
Part 3: http://youtu.be/14-NdQwKz9w
http://www.youtube.com/watch?v=ahXIMUkS ... e=youtu.be
Part 2: http://youtu.be/lOIP_Z_-0Hs
Interesting about the magnet experiment
Part 3: http://youtu.be/14-NdQwKz9w
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Re: Nature's Children
The only primate to communicate in pure ultrasound
http://www.newscientist.com/article/dn2 ... sound.html
One of my dogs came running in the room when I played this, perhaps 15 seconds into it or so.
http://www.tarsier.org/media_audio.html
Tarsiers Communicate in Secret Speech
http://news.sciencemag.org/sciencenow/2 ... tml?ref=hp
http://www.newscientist.com/article/dn2 ... sound.html
One of my dogs came running in the room when I played this, perhaps 15 seconds into it or so.
http://www.tarsier.org/media_audio.html
Tarsiers Communicate in Secret Speech
http://news.sciencemag.org/sciencenow/2 ... tml?ref=hp
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Re: Nature's Children
Chimp solves memory test 'faster than blink of an eye'
http://www.bbc.co.uk/nature/16832379
http://www.bbc.co.uk/nature/16832379
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Re: Nature's Children
"Adult males of the B. micra species grow to only just over a half-inch (16 millimeters) from nose to bottom, making them one of the smallest vertebrates ever found on Earth. From nose to tail, adults of both sexes grow to only 1 inch (30 mm) in length."
World's Tiniest Chameleon Discovered
http://www.livescience.com/18481-world- ... vered.html
World's Tiniest Chameleon Discovered
http://www.livescience.com/18481-world- ... vered.html
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Re: Nature's Children
World's Smallest Animals
http://www.youtube.com/watch?v=EaoBZCKeEmY
http://www.youtube.com/watch?v=EaoBZCKeEmY
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Re: Nature's Children
Six-Legged Giant Finds Secret Hideaway, Hides For 80 Years
http://www.npr.org/blogs/krulwich/2012/ ... r-80-years
http://www.npr.org/blogs/krulwich/2012/ ... r-80-years
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Re: Nature's Children
Finger of death
http://dsc.discovery.com/show-news/icy- ... pgn=twsci1
http://dsc.discovery.com/show-news/icy- ... pgn=twsci1
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Re: Nature's Children
Spider silk conducts heat as well as metals
http://www.sciencedaily.com/releases/20 ... 132613.htm
http://www.sciencedaily.com/releases/20 ... 132613.htm
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Re: Nature's Children
Whale evolution
http://www.youtube.com/watch?v=I2C-3PjNGok
http://www.youtube.com/watch?v=I2C-3PjNGok
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Re: Nature's Children
Attacus atlas female
http://www.youtube.com/watch?v=9r9Laslf4hc
http://www.youtube.com/watch?v=9r9Laslf4hc
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Re: Nature's Children
Brown Owl remarkable head stability
http://www.youtube.com/watch?v=k6M-h5g3PwI
http://www.youtube.com/watch?v=k6M-h5g3PwI
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