Supernova Remnant
A supernova remnant is the structure resulting from the explosion of a star in a supernova. A supernova is simply the explosion of a star. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way.
Dietary impact on lifestyle
The kind of food an organism consumes has a broad reaching impact on its development, behavior, and lifespan. In this issue, two papers, MacNeil et al. (pp. 240–252) and Watson et al. (pp. 253–266), explore the effects of diet on these life-history traits in the nematode C. elegans. Combining nutrigenomics and network analyses, they find that different diets affect traits via distinct mechanisms. The response to diet is coupled to metabolic changes, and disruptions of some of these specific metabolic pathways correspond to inborn errors of metabolism in humans. The cover features a “native-art-inspired abstraction” of a worm eating a bacterial diet and illustrates the interconnectedness between diet, nuclear gene regulatory networks, mitochondrial networks, and their effects on life-history traits such as development and brood size.Cover art by Lesley T. MacNeil
(via scientificillustration)
