In the warm waters around Guam, a coral reef quietly recorded a series of events taking place thousands of kilometres away. During the 1950s, the United States carried out powerful thermonuclear tests at Bikini and Enewetak in the Pacific.

Decades later, Guam's coral reefs unveil a hidden record of the 1950s U.S. nuclear tests, preserving carbon-14 spikes from 1954, 1956, and 1958. Discover how these natural…

In the warm waters around Guam, a coral reef quietly recorded a series of events taking place thousands of kilometres away. During the 1950s, the United States carried out…