Several specimens of the species, Fuxianhuia protensa (left), contain dark areas within their eye stalks (see fossil, above right; gray areas in sketch, bottom right) that represent preserved clusters of neural tissue, including clumps along the optic nerve (labeled 1 through 3 in the sketch) and the brain (lowermost mass). (sciencemag.org)
Most maps of anomalies use the same colour scale in successive monthly summaries, apart from the uppermost and lowermost bands depicted in each legend, which are adjusted when necessary to cope with extremes. (climate.copernicus.eu)