Genes & Cells

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water bear

NO WATER, NO PROBLEM  Known as water bears, tardigrades (one seen under a light microscope) are famous for withstanding desiccation. Drying out allows the animals to absorb DNA from other organisms, which may confer stress tolerance.

Douglas fir trees in Bryce Canyon

Ancestors of  Douglas firs (Pseudotsuga menziesii), such as this one growing in Bryce Canyon National Park, and other conifers underwent genome duplication — adding extra copies of genetic material — around the time of the Permian-Triassic extinction.

Anopheles stephensi mosquito

BLOCKING MALARIA  Anopheles stephensi (pictured) is responsible for about 12 percent of malaria cases in India. Researchers have now engineered these mosquitoes to spread malaria resistance instead of disease.

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