Age and Surgical Volume Impact Likelihood and Technique of Lateral Extra-Articular Augmentation During Primary Anterior Cruciate Ligament Reconstruction.

Purpose: To evaluate the current utilization trends of practicing surgeons performing and lateral extra-articular augmentation (LEA) at the time of primary anterior cruciate ligament reconstruction (ACLR).

Methods: The survey was distributed via e-mail in August 2023 to members of the Arthroscopy Association of North America who identified as knee surgeons and was available online on the Arthroscopy Association of North America website from January to September 2023. The 18-question survey was designed regarding surgeons' surgical utilization patterns of LEA during ACLR.

Extreme solar storms and the quest for exact dating with radiocarbon.

Radiocarbon (C) is essential for creating chronologies to study the timings and drivers of pivotal events in human history and the Earth system over the past 55,000 years. It is also a fundamental proxy for investigating solar processes, including the potential of the Sun for extreme activity. Until now, fluctuations in past atmospheric C levels have limited the dating precision possible using radiocarbon.

A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial.

We present new C results measured on subfossil Scots Pines recovered in the eroded banks of the Drouzet watercourse in the Southern French Alps. About 400 new C ages have been analysed on 15 trees sampled at annual resolution. The resulting ΔC record exhibits an abrupt spike occurring in a single year at 14 300-14 299 cal yr BP and a century-long event between 14 and 13.

A paleogenome from a Holocene individual supports genetic continuity in Southeast Alaska.

Many specifics of the population histories of the Indigenous peoples of North America remain contentious owing to a dearth of physical evidence. Only few ancient human genomes have been recovered from the Pacific Northwest Coast, a region increasingly supported as a coastal migration route for the initial peopling of the Americas. Here, we report paleogenomic data from the remains of a ∼3,000-year-old female individual from Southeast Alaska, named ().