The last major Social Security overhaul in 1983 gradually raised the full retirement age to 67, cutting benefits by 13 percent. Medicare eligibility remains unchanged: coverage begins at age 65.

Now, two landmark studies published Wednesday in Science and Cell, respectively, present molecular evidence confirming that a remarkably preserved 146,000-year-old hominin skull, discovered near ...

2018年唐纳德·特朗普总统任内，美国与波音公司签署了一份价值39亿美元的合同，要求设计、改装并测试两架飞机，2024年之前作为“空军一号”使用，然而持续延误下该项目已超出原定的交付日期。