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The smallest avian genomes are those of hummingbirds, report T. Ryan Gregory and his colleagues in Proceedings of the Royal Society B. According to the paper abstract, the genome sizes of birds are thought to be inhibited by flight's metabolic demands and by the relationship between nuclear DNA content and the size of red bloods cells.

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A New Zealand minister says the country's genetic modification laws need to be re-examined to help combat climate change, the New Zealand Herald reports.

A new analysis finds some cancers receive more nonprofit dollars than others.

An Australian mother's conviction in the deaths of her children may be re-examined after finding that two of the children carried a cardiac arrhythmia-linked gene variant.

In Science this week: comparative analysis of sex differences in mammal gene expression, and more.