Hmm, maybe the atomic bomb? The wright brothers's first flight took place about 120 years ago, so it doesn't qualify. However, in both cases, people knew it was

Hmm, maybe the atomic bomb? The wright brothers's first flight took place about 120 years ago, so it doesn't qualify. However, in both cases, people knew it was a matter of time before someone figured the proper recipe. Room temperature/pressure semiconductors? That was still science fiction yesterday. In short, you are probably right, with the sibling commenting on (BJT) transistors.