Nature, Published online: 14 October 2026; doi:10.1038/s41586-026-10972-z

A fossil bird from the Upper Jurassic Zhenghe Fauna of southeastern China contemporary with Archaeopteryx and that clearly could not fly sheds new light on the ecological diversification of early-diverging avialans.

Nature Energy, Published online: 05 August 2026; doi:10.1038/s41560-026-02125-3

The performance of perovskite/Cu(In,Ga)Se2 tandem solar cells is limited by optical and electronic losses at the interfaces between layers. By engineering two of these interfaces, Zeng, Wang, Tang et al. achieve a certified efficiency of 30.57% and improved device stability.