Thursday, February 16, 2006

I just read something that bothers me. A person wrote (paraphrased) "evolution isn't a science because it hasn't been observed in the present." Everytime a strain of bacteria becomes resistant to a certain type of antibiotic, that is evolution. Penicillin barely works anymore because most strains of bacteria have evolved to resist it. Say you have an infection and you treat it with antibiotics. Out of the millions of bacteria causing the infection, one of them might have a genetic mutation that prevents the antibiotic from killing it. So that bacteria survives, then multiplies. Now you have a whole new strain of bacteria resistant to the original antibiotic. This happens all the time. Welcome to evolution.

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