BACKGROUND Spider bite is a subject of much medical mythology with prevalent fears that spiders cause severe envenoming, with neurotoxic effects or necrotic ulcers. Clinical experience and small studies suggest otherwise, but this has not been confirmed by prospective studies of bites by identified spiders. AIM To describe the clinical effects of bites by accurately identified spiders, and de...

Urbanization is a major cause of biotic homogenization and habitat fragmentation for native communities. However, the role urbanization on success biological invasions continental scale has yet to be explored. may facilitate establishment invasive species by minimizing niche differentiation between invaded ranges. In such cases, we might expect anthropogenic variables have stronger influence ge...

Abstract We present the discovery of a new optical/X-ray source likely associated with Fermi ? -ray 4FGL J1408.6–2917. Its high-amplitude periodic optical variability, large spectroscopic radial-velocity semiamplitude, evidence for emission lines and flaring, X-ray properties together imply is probably black widow millisecond pulsar binary. compile 41 confirmed suspected field widows, finding m...