COLIN CUTHBERT / SCIENCE PHOTO LIBRARY COLIN CUTHBERT / SCIENCE PHOTO LIBRARY
Cancer research. Petri dish containing colonies of cultured human cancer cells under a low-power microscope. The microscope is used to count the number of cancer cell colonies that have grown from cancer cells treated with anticancer (chemotherapy) drugs and then left to grow in an incubator. This technique shows the effectiveness of each chemotherapy drug. The lines on the petri dish assists the counting of the colonies. The researcher in the background is placing treated cancer cells onto petri dishes before putting them in an incubator. Photographed in the laboratory of the Paediatric Oncology Unit of the Cancer Research Unit, Newcastle University, England.
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