A common concern for accepting immigrants is their effect on the host country’s welfare system. In a redistributive welfare system, where immigrants participate in the healthcare system, natives are inclined towards accepting high-income immigrants. A new study explores this question through a novel survey experiment, establishing a causal link between the perception of immigrants’ participation in the healthcare system and preferences towards different types of immigrants.

This study reports a labor-saving strategy for hybrid rice seed production using a small flag leaf mutant, ym66, derived from radiation-mutagenized indica rice 93-11. The mutant exhibits extremely short, narrow, and stiff flag leaves due to a 6-bp insertion in the OsGATA15 gene, which leads to cell death and reduced vascular development. Using this mutant, the researchers developed a novel restorer line, NP27, which requires no manual leaf cutting during hybrid seed production. Field tests showed that NP27 achieves seed yields comparable to traditional leaf-cutting methods, while reducing labor costs by approximately 150–180 CNY per mu. Additionally, NP27-derived hybrids display more compact plant architecture, uniform panicles, and improved grain quality. This work provides a "leaf-cutting-free" germplasm resource that simplifies hybrid rice seed production and lowers production costs.

The number of conflicts between states continued to increase sharply in 2025 and has now reached the highest level since World War II. At the same time, Uppsala Conflict Data Program (UCDP) at Uppsala University registered a record total number of armed conflicts.