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Up to 90% of the global shark population was wiped out around 19 million years ago. Plus, a nasal spray that could provide COVID-19 protection, and a Q&A with Biden’s new science adviser.
CoronaVac is one of two Chinese vaccines already sustaining vaccination campaigns in more than 70 nations. Both should soon be much more widely available to low-income countries.
Examination of the molecular interactions that govern the assembly of neural circuits in a brain region called the hippocampus reveals that neuronal projections are guided to their targets by both attractive and repulsive cues.
At a pivotal moment in the pandemic, Nature explores key questions about the vaccines that countries are racing to deliver while viral variants spread around the globe.