Rather than clarifying how speciation occurs, peering into closely related animals' genomes can raise more questions about the process. At Quanta, Emily Singer discusses two crow species — the black carrion crows and the black and gray hooded crows — that can interbreed and yet mostly remain separate species.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.