Chinese engineers have questioned the safety of NASA’s Artemis program, specifically highlighting potential risks associated with the single-engine design.

In the 21st century race to the moon, there is a question that engineers must ask: what happens when the main engine fails? China and the United States are answering this in contrasting ways. Their answers could reveal the value they place on human life. From the Apollo Lunar Module in the 1960s to Nasa’s new Orion spacecraft for the Artemis programme, the American architecture relies on a single, powerful main engine to do the heavy lifting. On the descent stage, one main engine controls the...