Low oxygen but dynamic marine redox conditions permitted the Cambrian Radiation.

Whether metazoan diversification during the Cambrian Radiation was driven by increased marine oxygenation remains highly debated. Repeated global oceanic oxygenation events have been inferred during this interval, but the degree of shallow marine oxygenation and its relationship to biodiversification and clade appearance remain uncertain. To resolve this, we interrogate an interval from ~527 to 519 Ma, encompassing multiple proposed global oceanic oxygenation events.

Shaking it off: loss of NHE3-mediated calcium reabsorption is compensated by the distal nephron.

Sodium reabsorption is tightly coupled to calcium reabsorption in the proximal tubule via the action of the Na/H exchanger isoform 3 (NHE3). Poulsen et al. provide evidence of reduced proximal calcium reabsorption in kidney tubule-specific NHE3-deficient mice that is compensated distally, unaltered phosphate homeostasis, and NHE3 involvement in the hypocalciuric effect of thiazides.

Scaling and networking a modular photonic quantum computer.

Photonics offers a promising platform for quantum computing, owing to the availability of chip integration for mass-manufacturable modules, fibre optics for networking and room-temperature operation of most components. However, experimental demonstrations are needed of complete integrated systems comprising all basic functionalities for universal and fault-tolerant operation. Here we construct a (sub-performant) scale model of a quantum computer using 35 photonic chips to demonstrate its functionality and feasibility.

Systematic Review: Efficacy of Medical Therapy on Outcomes Important to Pediatric Patients with X-Linked Hypophosphatemia.

Objective: To examine the evidence addressing the management of X-linked hypophosphatemia (XLH) in children to inform treatment recommendations.

Methods: We searched Embase, MEDLINE, Web of Science, and Cochrane Central up to May 2023. Eligible studies included RCTs and observational studies of individuals less than 18yrs with clinically or genetically confirmed XLH.