Nuclear weapons have come a long way and come in all types of different sizes. Some are relatively small while others are ...

Russia’s tactical nuclear weapons and hypersonic missiles pose a significant threat to Western security. With an estimated ...

A nuclear explosion might eventually be Earth’s only way to protect itself from a dangerous asteroid. But preparing for that ...

Many scientists say “subcritical” experiments and computer simulations make nuclear weapons testing unnecessary.

The history of nuclear weapons design, testing ... and nations may need to build big weapons to be confident, not on the scale of America’s original five-ton behemoths, Little Boy and Fat ...