A recent scientific preprint, 'Heterogeneous Wettability Alters Methane Migration and Leakage in Shallow Aquifers,' published on arXiv, explores the critical role of contact angle variability and capillary heterogeneity in modeling methane movement within shallow aquifers. The study, authored by Sabber Khandoozi et al., reveals that the spatial variation in the water-methane contact angle, influenced by mineralogy and salinity, significantly reshapes capillary entry pressures and thus the migration pathways of methane. By integrating molecular dynamics simulations to estimate contact angles on common aquifer minerals like quartz and kaolinite under various conditions, the researchers incorporated these findings into continuum-scale multiphase flow simulations. This cross-scale framework provides a more physically grounded basis for understanding methane transport. The key finding indicates that accounting for this contact angle heterogeneity alters methane behavior considerably. The amount of mobile and residually trapped methane within aquifers decreases by up to 10%, while, crucially, the leakage of methane to the atmosphere could increase by as much as 20%. The magnitude of this effect is influenced by factors such as permeability contrast, leakage rate, salinity, and facies proportions. Methane leakage into shallow aquifers is a significant environmental concern, posing risks to groundwater quality and contributing to greenhouse gas emissions. Understanding these complex subsurface processes is vital for accurate groundwater protection strategies and more reliable estimates of atmospheric methane emissions, which directly impact global climate change mitigation efforts. This research provides valuable insights for addressing subsurface gas transport problems, including natural releases and potential storage issues related to hydrogen and carbon dioxide. The ESS Open Archive is a legitimate platform for disseminating such early research outputs in Earth and space science.