An interim update to the landmark State of the World’s Migratory Species of 2024 warns that 49% of migratory species populations protected under a global treaty are declining, up 5% in just two years, and 24% of species face extinction, up 2%. The new warnings will be presented to the 15^th Meeting of the Conference of the Parties to the Convention on the Conservation of Migratory Species of Wild Animals (CMS COP15), a legally-binding UN treaty, in Campo Grande Brazil March 23-29.

Electromagnetic radiation interferes with the operation of electronic devices and poses a threat to human health, while traditional microwave absorbing materials are difficult to meet the core requirements of being "thin, light, wide and strong". Inspired by the structure of coral reefs, a Chinese research team has designed a ZnNiCo-LDH/MXene composite material. Through biomimetic porous structures and high-density heterojunction engineering, it achieves an electromagnetic reflection loss of -49.6 dB at a thickness of 1.35 mm and a radar cross-section suppression of -39.57 dB · m². This breakthrough provides a brand-new approach to solving the problems of electromagnetic pollution and military stealth technology.

Thermal stability and environmental sustainability are paramount to the practical deployment of perovskite solar cells (PSCs), which are designed to harness solar energy through high-efficiency and low-cost photovoltaic technology. Pseudo-halide thiocyanate anions (SCN⁻), employed as a crystallization modulator, have emerged as an ideal candidate for tailoring the formation of high-quality mixed-cation perovskite films, paving the way for a new era of efficient and high-quality PSCs.