News@nature.com looks at how much we know about the country’s nuclear abilities.

On Monday morning, North Korea announced it had performed an underground test of a nuclear bomb, apparently warning China about 20 minutes beforehand. North Korea has been asked to step back from nuclear ambitions; the news of this first test has brought widespread international condemnation.

Read the briefing here.

News@nature.com looks at how much we know about the country’s nuclear abilities.

On Monday morning, North Korea announced it had performed an underground test of a nuclear bomb, apparently warning China about 20 minutes beforehand. North Korea has been asked to step back from nuclear ambitions; the news of this first test has brought widespread international condemnation.

Read the briefing here.