- Ultraviolet and yellow reflectance but not fluorescence is important for visual discrimination of conspecifics by Heliconius erato
Highlighted Article: Heliconius butterflies use a co-opted yellow pigment for conspecific communication, which predators find similarly aposematic compared with the ancestral yellow pigments used by non-Heliconius mimics.
- Selective attention in peacocks during assessment of rival males
Summary: Peacocks selectively direct their attention toward the lower display regions of the train during rival assessment in a pattern similar to how peahens direct their attention toward potential mating partners.
- Hidden female physiological resistance to male accessory gland substances in a simultaneous hermaphrodite
Summary: The effect of accessory gland proteins transferred on the love-dart of land snails can remain hidden within a species as a result of physiological female resistance to male manipulation.
- Sex-specific nutrient use and preferential allocation of resources to a sexually selected trait in Hyalella amphipods
Summary: Age influences sexual dimorphism in carbon and phosphorus acquisition and assimilation, a pattern potentially driven by the exaggeration of male sexual traits to which resources are preferentially allocated.
- In vitro strain in human metacarpal bones during striking: testing the pugilism hypothesis of hominin hand evolution
Summary: Recorded strains in the metacarpal bones during striking support the hypothesis that a clenched fist substantially reduces strain in the bones of the hand and therefore reduces the risk of fracture.