Sex chromosome evolution has traditionally been viewed as a linear, time‐dependent process. However, numerous comparative studies across diverse taxa have revealed that homomorphy can persist over long evolutionary time scales. Similarly, recent reports of unexpectedly rapid Y chromosome degeneration, particularly in species with evolved X chromosome dosage compensation, suggest alternative evolutionary trajectories that chall...

Global ocean warming continued unabated in 2025 in response to increased greenhouse gas concentrations and recent reductions in sulfate aerosols, reflecting the long-term accumulation of heat within the climate system, with conditions evolving toward La Niña during the year. In 2025, global upper 2000 m ocean heat content (OHC) increased by ∼23 ± 8 ZJ relative to 2024 according to IAP/CAS estimates. CIGAR-RT, and Copernicus Ma...