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Do they feel pain as we do??
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 18348
Location: Richland, Washington State, USA

PostPosted: Fri Mar 14, 2008 2:08 pm    Post subject: Reply with quote

Harold Gough wrote:
Regrowth can go wrong:

http://www.zin.ru/animalia/coleoptera/eng/coraeb7.htm

This is called teratology and I once had a specimen with twin tarsi on one leg.

Very interesting link.

This specific example seems like a good example of teratology, but I don't see "regrowth" since those spare legs formed in a single go during pupal development. Or are you thinking about some underlying phenomenon that I've overlooked?

BTW, I had a chance yesterday to review a fascinating project involving chemical stimulation of regrowth and healing in stick insects and flatworms. This was in the senior division of our regional ISEF-affiliated science fair. The student did a really nice job -- he'll go far. (Sell your stock in ginseng; buy grape-seed extract.)

--Rik
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JoanYoung



Joined: 09 Oct 2007
Posts: 583
Location: South Africa

PostPosted: Fri Mar 14, 2008 6:57 pm    Post subject: Reply with quote

Thanks for the interesting link Harold and for everyones comments. Regrowth is a very interesting subject and one wonders why insects and lizards are capable of it but not humans or animals. Question Smile Has any research been done into our missing link. Question
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Harold Gough



Joined: 09 Mar 2008
Posts: 5787
Location: Reading, Berkshire, England

PostPosted: Fri Mar 14, 2008 11:36 pm    Post subject: Reply with quote

Ken,

The image I posted was not necessarily the most representative but it was available and suitable for illustrative purposes. More relevant examples are hidden in journal references which do not offer free access.

I would like to have researched it more but there is too much about teratology of embryonic origin rather from regeneration.

Harold
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