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Genetics

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rabbit

RABBIT TALE Rabbits came from the Iberian Peninsula and Southern France, but scientists are still debating how the animals became domesticated.

simulation of bundled chromosomes

PACK IT UP  Before dividing, a cell bundles each of its chromosomes (gray and colored strings in this simulation of a single chromosome) into a tightly-packed, orderly cylinder. A protein that creates a central, spiral scaffold (red links) is partly responsible for the efficient packing, a new study finds.

phages

VIRAL ATTACK  Viruses called phages (shown landing on the surface of a cell in this transmission electron micrograph) can infect and kill bacteria. Scientists have just found a slew of new defense mechanisms that help bacteria resist such assaults.

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