"The world's marine ecosystems risk being severely damaged by ocean acidification unless there are dramatic cuts in CO2 emissions, warn scientists."... ...
Stimulated by Dave's session on Evolution last night, I got to wondering about how much change can typically be caused by the mutation(s) in one individual,...
I am sorry I missed Dave's talk but I had a good report of it ( from only one person but at least it's a start) Only teasing Dave John raises issues that were...
Hi John , I think one of the issues with large mutations is co-ordination eg if a "soon to be giraffe" grew much bigger neck bones then it would be very...
Great stuff on the giraffe Dave. It shows how you have to really think about this stuff. But I don't know why the article assumed you have to select between...
Brian, There was a 16 page special report about this in 'The Economist' on January 3rd. (See www.economist.com/specialreport) It also covers other threats like...
Hi all Apropos my talk on "Evolution" and sperm deterioration , here are some recent findings, from the Scientific American, re specific "diseases" now being...
My highlights below- confirming my distrust of the results of " models". 100% uncertainty by 2050??? Hmmm! From Scientific American Dave T 07768-355-814 ...
Thanks guys – very helpful. Re the peppered moth mentioned by Peter, it seems to me that its extensive use as an example of evolution is misplaced. It's...
Richard, I know October 2008 is a long time ago but I did promise you a better reply to your question so this is it:- Basically I've gone back to the CO2...
Good point John and again you raise some deep issues. I quoted the moth as it was used as a reference at a talk I went to with Adrian Fisher when we worked in...
Folks Thanks to Dave again for this but I wanted to lob something else in for you all to worry about! I have just listened to the radio 4 programme Saving the...
It's not science but it is probably as accurate at forecasting as these GW computer models you keep asking me to believe in . Even if it is a bit out -- Things...
Hi John, Not quite -- There needs to be variation within the species for natural selection to work at all . It's still evolution if the environment changes in...
Very good Dave I saw a programme on the telly whereby they had found the 'switch' in the hen's gene which turned off the formation of teeth and turned it back...
Dave, Most evolution seems to be a slow change in bone/body shape. (Giraffe neck being a simple example). For this to happen each generation must have a ...
Dave, I'm always puzzled by this 'neo-catastrophism' stuff you probably picked up from Benny Peiser. I've read some of their material and it seems to say that ...
We only really believe in catastrophes when they happen! When we are warned and take action and the catastrophe doesn't happen then we think that it was all...
Oops I was working on hearsay I think this may be the article that my friend was referring to However I agree there may not be any new findings in all of this...
David, Peter et alia, I think you're being a bit paranoid . I don't see this stuff as a catastrophe, and Benny Peiser is not in the loop, rather it's the...
Dave S, The cause of the variability is a difference in the 4 DNA letters( C,G,A,T ) which make up a gene. It maybe only one letter change in a gene which...
Thanks Dave, it doesn't really answer my question as I'm focused on the DNA mechanics. Do you have any idea how many blocks of DNA get swapped during meiosis? ...
Dave, This subject is not just a matter of opinion. Science clearly demonstrates that we are very likely to trigger a mass extinction if no action is taken. ...
Hi Dave , My understanding is that it is a small no. of sites but random. The "piece of DNA" that gets "swapped" between paired chromosomes could start in the...
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