Geoff Brumfiel

Following a mysterious explosion at a Russian missile testing site last week, several radiation monitors maintained by an international organization have gone offline.

More nations than ever are racing to the moon. Their lunar ambitions are driven by advances in technology and a desire to prove themselves.

On the 50th anniversary of the Apollo landings, more nations than ever are racing to the moon. Their lunar ambitions are driven by advances in technology and a desire to prove themselves.

A Norwegian team has found some radioactivity leaking from the sub, which sank in 1989. But they say it poses no threat to the environment.

The move signals that Iran is losing patience with the 2015 agreement after the U.S. blocked the economic relief promised.

Iran announced Monday that it has exceeded the 300 kilogram limit on low-enriched uranium set by the nuclear deal it made with six world powers.

An Iranian news agency is reporting that the country has exceeded limits for enriched uranium set in the 2015 nuclear deal. President Trump pulled the U.S. out of that agreement.

As soon as Thursday, Iran is expected to surpass a key limit set in place by the 2015 nuclear agreement. It could spell the end of the deal.

Iran announced Monday that it will soon exceed a 300 kilogram limit on enriched uranium. It's the latest sign that a 2015 nuclear deal is unraveling.

The billionaire wants to deploy thousands of satellites in order to provide global Internet, but astronomers say they could create unsightly glare.

Iran has been developing drones for both itself and its proxies. In recent months those drones have been used for targeted assassinations, military strikes and to sow chaos in the region.

Iran has announced its intention to begin withdrawing from parts of a 2015 nuclear agreement in 60 days. The decision could reduce the time needed to develop a nuclear weapon — if Iran chose to do so.

Experts say the missile, tested on May 4 as part of a "strike drill," could be a new and destabilizing weapon on the Korean Peninsula.

Saudi Arabia is building a small civilian nuclear reactor, the nation's first. Nuclear power is an important part of its energy plans. Arms control experts ask if its intention is entirely peaceful.

The 60 or so members of the Jasons are normal academics by day. But each summer, they come together to study tough problems for the military, intelligence agencies and other parts of the government.

The president's 2020 budget plan calls for studying space-based energy weapons as a way to stop warheads. Critics say it didn't work with the "Star Wars" program in the 1980s and it won't work now.

The device was detonated as part of a mission to better understand the origins of planets.

New Delhi says it destroyed one of its own satellites in orbit, making India only the fourth country to test such a weapon.

A Spanish judge said the alleged attackers offered stolen hard drives and other materials to the FBI.

Multiple interceptors tracked and destroyed a missile carrying a dummy warhead. Advocates claim the test proves the system can provide some defense against countries such as North Korea.