A recent study published in National Science Review has revealed that atmospheric oxidation capacity at northern midlatitude regions is approaching a turning point, challenging prior assessments of hydroxyl radical (OH) increases or stability. Over the past 50–60 years, OH levels have remained near peak values. Future sustained reductions in nitrogen oxide (NO_x) emissions will lead to a decline in surface OH concentrations across the northern midlatitude regions, implying an increase in the atmospheric lifetime of pollutants and methane. This poses new challenges for regional air pollution control and climate change mitigation.

Most aquaculture species have long maturation periods that limit breeding efficiency. Here, researchers from the Institute of Hydrobiology, Chinese Academy of Sciences, report in Science China Life Sciences with a cover story of an ultra-fast surrogate reproduction strategy: female germline stem cells from grass carp (Ctenopharyngodon idellus), a species requiring ~5 years to mature and >20× longer and ~20,000× heavier than zebrafish, were transplanted into zebrafish (~3 cm, 3-month maturation), producing all-female grass carp within just three months, dramatically shortening the breeding cycle.