With a clear and accessible introduction and a valuable set of links, each feature represents a great opportunity to keep abreast of the most important work in all fields. This week, Haile et al . show that solid acids can be used as an electrolyte, bringing fuel cells a step closer to commercial applications. Writing in this week's Nature , Waite et al .
Frogs feel the heat Amphibian populations are in rapid and concerning decline globally.
Suggested causes include disease, farm chemicals and pollution. This week, Kiesecker and colleagues present evidence that anthropogenic global warming is the overall cause, reducing water depth at spawning sites. This exposes amphibian embryos to UV-B radiation, leading to fatal infection. But its subsequent spread raises issues about the management and control of infectious diseases in livestock, both specific to FMD and more generally, say Professor Mark Woolhouse and Dr Alex Donaldson in a Commentary in this week's Nature . In this week's Nature , Fritz Vollrath and David Knight reveal some of the spider's remarkable manufacturing techniques.