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Was the decision to bomb Hiroshima and Nagasaki morally wrong? 75 years later, the question is more difficult to answer than first appears.

A prototype of the engine for SpaceX's next-generation Starship vehicle has made a 150m test "hop".

New York's attorney general announces a lawsuit aimed at dissolving the powerful gun lobbying group.

The boys were fleeing police and "had no idea" they had entered the US president's property.

Turning wild spaces into farmland or cities creates opportunities for diseases to cross into humans.

After defaulting on its substantial national debt, the Seychelles was offered an unusual deal.

A new Canadian clinical guideline aims to reduce stigma against overweight patients.

Knocking down defunct structures sends a wrecking ball through carbon targets, architects say.

The European Commission's move has the potential to derail the $2.1bn takeover.

The explosion has caused widespread damage, with hospitals struggling to treat all the casualties.

The DR Congo’s role in creating the bombs dropped on Hiroshima and Nagasaki was kept secret for decades, but the legacy of its involvement is still being felt today.

Astrophysicist Katie Mack has been researching The End of Everything.

In a court filing, lawyers said the investigation spans over a decade of possible criminal activity.

The Micronesian men were spotted by Australian and US aircraft after being reported missing on Saturday.

The president has given Microsoft 45 days to reach a deal or he will ban the app in the US.

Several carnivorous animals have almost disappeared from areas set up to protect giant pandas.

Bill English was the first person to use a computer mouse, building the first prototype in 1963.

Ricardas Puisys was found deep in woods, where it is thought he was trying to avoid exploitation.

His departure comes weeks after the former monarch was linked to a probe into alleged corruption.

The boy followed the exact advice the RNLI would give to anyone in difficulty, his rescuers say.

The renowned pianist spent a large part of his career focused on music written for the left hand.

Nearly three times more people died than Iran's government admitted, records seen by the BBC show.

Egypt invited the billionaire to visit, after he appeared to tweet support for conspiracy theorists.

Kenyan activist Phyllis Omido has been ignored, harassed and arrested, but she never gave up.