Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
How does a fruit fly’s brain determine which way the animal should escape in the face of a looming predator? A mechanism involving numeric gradients of synaptic connections between neurons provides an answer.
Sophisticated experimental approaches reveal cellular and immune-system mechanisms that enable rare HIV-infected cells to persist for decades in people who are taking antiretroviral drugs.
Mouse and human embryos undergo similar developmental steps, but the exact timings differ. An analysis reveals that differences in metabolic activity set the timing of one such step on the road to formation of the vertebrae.
An analysis of more than 1,500 field observations has identified a collection of agricultural practices that can improve the use of nitrogen fertilizers — boosting crop yields while reducing environmental pollution.