31 MAY 2015 by ideonexus
Conceptual and Technological Revolutions
There are two kind s of scientific revolutions, those
d riven by new tools and those d riven by new concepts.
Thomas K uhn in his famous book, The Structure of
Scientific Revolutions, talked almost exclusively about
concepts and hard ly at all about tools. His id ea of a
scientific revolution is based on a single example, the revolution in theoretical physics that occurred in the
1920s with the advent of quantum mechanics. This was
a prime example of a concept-d riven revolution.
K uhn's book...Folksonomies: progress revolution
Folksonomies: progress revolution
20 SEP 2011 by ideonexus
Penicilin Resistant Staphylococcus
Another prime example of selection is resistance to penicillin. When
it was introduced in the early 1940s, penicillin was a miracle drug, especially
effective at curing infections caused by the bacteria Staphylococcus
aureus (“staph”). In 1941, the drug could wipe out every strain of staph in
the world. Now, seventy years later, more than 95 percent of staph strains
are resistant to penicillin. What happened was that mutations occurred
in individual bacteria that gave them the ability to ...Folksonomies: evolution resistance
Folksonomies: evolution resistance
Evolution in action.