Lithium hydride
Before the Castle Bravo nuclear weapons test in 1954, it was thought that only the less common isotope lithium-6 would breed tritium when struck with fast neutrons. The Castle Bravo test showed (accidentally) that the more plentiful lithium-7 also does so under extreme conditions, albeit by an endothermic reaction.
Castello Brown
The castle's site is well suited for harbour defence, and appears to have been so used since the 15th century. According to the Record Office of Genoa, cannon batteries were constructed on the site in the early 16th century, and military engineer drew up plans for a full fortress circa 1554. The resultant castello was completed by 1557, and, in 1575, was instrumental in turning back an attack on the town by Giò Andrea Doria. The structure was enlarged from 1622 to 1624, and survived in this form for a century and a half. The little tower was destroyed in 1798 by an English attack during Napoleon's Ligurian Republic. The castello was abandoned after the Congress of Vienna in 1815.