When Isaac Newton was old, he used to give his visitors a lock of his hair in a small gold case, because he knew, and they knew, that they would be museum piece

When Isaac Newton was old, he used to give his visitors a lock of his hair in a small gold case, because he knew, and they knew, that they would be museum pieces one day. He was right, I saw one of them in a museum. I don't think any living scientist could confidently do that today.