Zehao Zhang

Jan 22, 2025 | science.org | Christina Jackson |Zehao Zhang |Lawrence O. Gostin |Benjamin Mason Meier

On 20 January, President Trump announced the withdrawal of the United States from the World Health Organization (WHO). President Trump shares many of the same concerns about WHO as previous administrations, including improved transparency, financial oversight, and accountability. He also believes that China has exerted undue influence on WHO—a charge that WHO adamantly denies. But the US cannot influence WHO if it is not at the table.

Jan 21, 2025 | science.org | Christina Jackson |Zehao Zhang

As in his earlier term, US President Donald Trump’s misguided announcement that the US will withdraw from the Paris Agreement on climate continues a long history of confusion—mostly created intentionally—over the intersection of climate science and US climate policy. The tactics and consequences are no different from what opponents of climate science and action have been using for almost 50 years.

Jan 16, 2025 | science.org | Christina Jackson |Zehao Zhang |Yu ZHANG |Yanrun Chen

Editor’s summaryThe photoactive phase of formamidinium lead triiodide (FAPbI3) is usually stabilized with other cations or anions that can segregate over time. Zhang et al. show that iodine helps to form corner-sharing lead-iodine species that improve stability, and that its subsequent decalation improves film quality. Solar cells made with these films had power conversion efficiencies greater than 24% and retained 99% of that efficiency after more than 1100 hours of operation at 85°C.

Jan 16, 2025 | science.org | Christina Jackson |Zehao Zhang |Sacha Vignieri |Marc S. Lavine

Climate Change Feeling the squeezeSacha VignieriDesert lizards such as the Australian thorny devil, pictured here, have so far been resilient to increasing temperatures, unlike their African counterparts. PHOTO: PAUL D. STEWART/SCIENCE SOURCEEctothermic species such as lizards are likely to be more susceptible to increasing temperatures because of the physiological relationship between external conditions and their metabolic rate. Wild et al.

Jan 16, 2025 | science.org | Christina Jackson |Zehao Zhang |Ekeoma Uzogara

Exoplanets Silicate clouds on lava worldsKeith T. SmithArtist’s impression of a lava planet with a magma ocean on its daysideIMAGE: NASA/KEPLER MISSION/DANA BERRYSome rocky exoplanets orbit so closely to their host star that the dayside temperature is high enough to melt rock. Such planets are thought to have a magma ocean surface on their dayside, which is tidally locked to always face the star.