CRISPR-based technology is advancing rapidly, driving international competition. Its promise to transform medicine is colliding with political and social realities, even as applications expand.

Since the middle of the 20th century, antibiotics have been among the greatest successes in medicine. They save millions of ...

The Israeli Iron Dome air-defense system (Leo Correa/Associated Press) Israel’s air defenses---a multi-layered system that includes the famed Iron Dome---are among the best in the world and the most ...