This Week in Nature

In Nature this week, an international team of researchers report the sequences of 101 monarch butterfly genomes, providing insights into the genetic basis of the insects' migration patterns and coloration. The scientists examined the genomes of monarch butterflies from around the world, including non-migratory and white varieties. Among those that migrate, they discovered genes involved in flight efficiency, including ones that enhance flight muscle function.

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The US Food and Drug Administration has approved Kite Pharmaceuticals' CAR T-cell therapy for large B-cell lymphomas, the New York Times reports.

Kaiser Health News reports that gene therapies could cost more than a million dollars.

Worcester Polytechnic Institute researchers have received a grant to combine biology and computer science for high school students.

In Nature this week: variants associated with obsessive-compulsive disorder, review of key CRISPR enzymes, and more.