Rare, dangerous side effects of some COVID-19 vaccines explained

本文探讨了某些COVID-19疫苗罕见且危险的副作用。

Pre-Incans collected seabird poop from remote islands to use as fertilizer

研究：古代印第安人从偏远岛屿收集海鸟粪便作为肥料。

India has big plans to remove silt from rivers, alarming scientists

印度计划清除河流泥沙，引起科学家担忧。