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In rangeomorphs of the Ediacaran period, first appearing 571 million years ago, growth of branch internodes declined as their surface area decreased relative to volume, suggesting nutrient-dependent growth.
Co-mapping the incidence of worker reproduction and queen pheromone chemical composition on a phylogeny of stingless bees reveals no association between queen hydrocarbon profiles and worker reproduction.
In a semi-naturalistic ‘Metatron’ experiment, a rise of 2–3 °C causes a reduction in gut microbiome diversity of over one-third in an ectotherm, the common lizard (Zootoca vivipara).
Humans and great apes show left-cradling bias but it is unclear how widespread this bias is. Here, the authors show lateralization in interactions between an infant and its mother in 11 marine and terrestrial mammals, which suggests that lateralization has an ancient evolutionary history.
Environmental DNA from water samples can be used to detect the presence and abundance of aquatic organisms. Here, the authors show that it can also be used to obtain population genetic information from whale sharks in the Arabian Gulf.