Stay updated with breaking news from Rr Core Team. Get real-time updates on events, politics, business, and more. Visit us for reliable news and exclusive interviews.
This randomized trial compares the effect of intermediate-dose vs standard prophylactic enoxaparin on a composite outcome of acute venous thromboembolism (VTE),
The recovery of top predators is thought to have cascading effects on vegetated ecosystems and their geomorphology1,2, but the evidence for this remains correlational and intensely debated3,4. Here we combine observational and experimental data to reveal that recolonization of sea otters in a US estuary generates a trophic cascade that facilitates coastal wetland plant biomass and suppresses the erosion of marsh edges—a process that otherwise leads to the severe loss of habitats and ecosystem services5,6. Monitoring of the Elkhorn Slough estuary over several decades suggested top-down co...
Studies have reported widespread declines in terrestrial insect abundances in recent years1–4, but trends in other biodiversity metrics are less clear-cut5–7. Here we examined long-term trends in 923 terrestrial insect assemblages monitored in 106 studies, and found concomitant declines in abundance and species richness. For studies that were resolved to species level (551 sites in 57 studies), we observed a decline in the number of initially abundant species through time, but not in the number of very rare species. At the population level, we found that species that were most abun...
In this Danish nested case-control study, Nelsan Pourhadi and colleagues investigate the influence of the progestin-component of menopausal hormone therapy on central nervous system tumors.
Judith Leblanc and co-workers report a cluster-randomized trial evaluating intensive screening for SARS-CoV-2 infection in emergency departments.