This Week in Nature

In a paper published online in advance in Nature this week, members of the Heliconius Genome Consortium report having sequenced the genome of the neotropical butterfly H. melpomene, which they compared "with other taxa to investigate chromosomal evolution in Lepidoptera and gene flow among multiple Heliconius species and races." Further, using genomic resequencing, the group presents evidence of "hybrid exchange of genes between three co-mimics, H.

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The New York Times and ProPublica look into the close relationship between a startup and Memorial Sloan Kettering Cancer Center.

Yahoo News reports millions of dollars are being transferred from NIH, CDC, and other programs to pay for the housing of detained undocumented immigrant children.

In Science this week: in vitro generation of human reproductive cells, and more.

Researchers gave a handful of octopuses MDMA to find that they too act more social on the drug, Gizmodo reports.