Israel said the four hostages, all women, were back in the country. President Aleksandr G. Lukashenko, a close ally of Russia’s leader, Vladimir V. Putin, has been making signs of reaching out ...

The expected retirement length in the U.S. is 18.6 years for men and 21.3 years for women. Retirement ... been among older adults in the 55-to-59, 60-to-64, 65-to-69, and 70-to-74 age ranges.

To tackle a backlog in toxicity testing, US federal scientists are modernizing programs with high-throughput assays and AI.