North Korea may be significantly expanding its nuclear weapons production and could have added six or more weapons to its stockpile in the last 18 months, a U.S. research institute said on Tuesday. The Washington-based Institute for Science and International Security (ISIS) estimated last year that North Korea had 10 to 16 nuclear weapons at the end of 2014. It based that conclusion on an analysis of the country's production of weapons-grade uranium and plutonium recovered from spent nuclear fuel.

A famous dagger found in the wrapping of Egyptian King Tutankhamun's mummy was made with iron from a meteorite, a new study confirms.

As it seeks to modernize its nuclear arsenal, the United States faces a big choice, one which Barack Obama failed to mention during his moving Hiroshima speech on May 27.The Conversation Should we spend a trillion dollars to replace each of our thousands of nuclear warheads with a more sophisticated substitute attached to a more lethal delivery system? Or should we keep only enough nuclear weapons needed for a devastatingly effective deterrence against any nuclear aggressor, investing the money saved into other means of making our nation more secure?

North Korea test-fired what appeared to be two intermediate range ballistic missiles on Thursday but both failed, a South Korean official said, in a setback for North Korean leader Kim Jong Un in the run-up to next week's ruling party congress.

The U.S. military on Thursday christened an experimental self-driving warship designed to hunt for enemy submarines, a major advance in robotic warfare at the core of America's strategy to counter Chinese and Russian naval investments.

North Korea successfully tested a solid-fuel engine that boosted the power of its ballistic rockets, state media reported on Thursday, as South Korea's president ordered the military to be ready to respond to the North's "reckless provocation". Pyongyang's claim indicates it is continuing to develop an intercontinental ballistic missile (ICBM) at a rapid pace in defiance of U.N. sanctions, and amid assessment by the South's officials that it could conduct a new nuclear test at any time.

New "Improv" program will look at how commercial tech can be used against military.

Soldiers in the U.S. Army may soon be taking to the battlefield with laser weapons, according to a military spokesperson. Speaking to a House of Representatives subcommittee, Army for Research and Technology deputy assistant secretary Mary J. Miller said that tests are currently ongoing to determine the full capabilities of this type of weaponry, and that they could be deployed as early as 2023.

A Yale bioethicist says the United Nations won’t stop killer robots, but the United States could right now start setting a few rules limiting their development and use. By Patrick Tucker.

Although the Joint Program Office maintains the F-35 program remains on track, the Pentagon’s top weapons tester recently raised concerns that the fifth-generation fighter jet’s software development could fall behind schedule. By Lara Seligman.

For over a century the longbow reigned as undisputed king of medieval European missile weapons. Yet only England used the longbow as a mainstay in its military arsenal; France and Scotland clung to the technologically inferior crossbow. This longbow puzzle has perplexed historians for decades.

The U.S. Air Force has decided to indefinitely postpone the retirement of the legendary A-10 Thunderbolt II ground attack plane. The venerable Warthog's increased role in the air campaign against the Islamic State in Iraq and Syria was the Pentagon's main reason for the postponement. First developed in the 1970s, the A-10 was designed to kill Red Army tanks on European battlefields. Heavily armored and capable of flying low and slow...

“At the time of South Africa’s decision to abandon its nuclear weapons program, the South African bomb was already small enough to arm both the H2 and South Africa’s ballistic missile under development. And, perhaps not so surprisingly, remnants of this program showed up on the market for export to places like Pakistan.” By Jeffrey Lewis. (Dec. 3)

It's one of the biggest secrets in the government: The U.S. has the most powerful cyberweapons on Earth. So what are they? And when will we use them?

The most feared bomber plane of the 20th Century is still going strong after 60 years in Vietnam, Iraq and Afghanistan. How has it lasted so long?

Had Thomas's view prevailed, it could have set off a cycle that gradually made virtually any restrictions on the types of firearms owned by civilians unconstitutional.

With more than 300 million firearms owned by U.S. civilians and at least 100 million guns produced by U.S. manufacturers in the last 25 years, the U.S. has the highest rate of gun ownership in the world. With such a large market, the U.S. gun business is extraordinarily lucrative, generating around $8 billion in annual new small arms sales.

Russia carried out the first successful flight test of a new anti-satellite missile this month, marking a new phase in the global militarization of space. The flight test of Russia’s direct ascent anti-satellite missile, known as Nudol, took place Nov. 18, according to defense officials familiar with reports of the test. It was the first successful test in three attempts, said officials who spoke on condition of anonymity.

Small drones are the ultimate smart bombs: They can become portable, personal cruise missiles weighing five pounds or less able put a warhead on target miles away. Some, like the Israeli Hero-30, are already being deployed. But the next generation of such U.S. weapons will have advanced warheads that can hit targets from tanks to buildings. These will be based on a railgun weapons technology descriptively known as MAHEM.