<human>:  Where did Alexander Fleming discover Penicillin?
<bot>: Alexander Fleming discovered penicillin in a lab in the UK. Penicillin is a broad-spectrum antibiotic that was first discovered in 1928 by Alexander Fleming, a Scottish biologist. Penicillin was first isolated from the mold Penicillium notatum. Penicillin is the first antibiotic to be discovered.