Long strands of DNA wind themselves around a chromatin "spool" made out of the protein histone in this picture taken with a new 3-D atomic-force microscope, the NanoWizard BioAFM. Histone plays a crucial role in DNA replication because it allows your 1.8-meter-long strands of DNA to fit inside your cells. New microscopes, like the NanoWizard, offer stability across three axes and image buffering, allowing scientists a better look at genetic duplication as it happens. [Azonano]

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