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New research has identified DNA exchange as a major factor in the broad diversity of Heliconius butterflies, highlighting the importance of hybridization to species evolution. In the study, which appears in this week's Science, an international research team generated genome assemblies for 20 major Heliconius species, as well as three related genera.

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Nature News reports on how meeting cancellations and related costs are affecting scientific societies.

In a new ruling, Canada's Supreme Court upheld the country's genetic non-discrimination law, the Canadian Press reports.

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In PLOS this week: analysis of insertions throughout Shigella genomes, antigen production in malaria parasites, and more.