十一岁的艾丽不喜欢改变，希望五年级不要结束，希望从一年级就认识的好朋友不要渐行渐远。她甚至还想念她亲爱的金鱼—独一无二的哥帝十三世。
一天，一个十三岁的陌生男孩突然出现。这个男孩有些霸道，爱胡思乱想。奇怪的是，这个男孩很像艾丽的外公梅尔文—一个痴迷于研究永生的科学家。难道这个男孩就是艾丽的外公？难道艾丽的外公已经发现了永葆青春的秘诀？文章源自：力哥爱英语（ienglish521.com）力哥爱英语-https://ienglish521.com/751.html
作者用幽默愉快的笔触，颂扬科学的奇迹，探索令人着迷的一系列话题，包括生死、家庭、友谊、不朽，以及万物的可能性。文章源自：力哥爱英语（ienglish521.com）力哥爱英语-https://ienglish521.com/751.html
Galileo. Newton. Salk. Oppenheimer. Science can change the world . . . but can it go too far? 文章源自：力哥爱英语（ienglish521.com）力哥爱英语-https://ienglish521.com/751.html
Eleven-year-old Ellie has never liked change. She misses fifth grade. She misses her old best friend. She even misses her dearly departed goldfish. Then one day a strange boy shows up. He’s bossy. He’s cranky. And weirdly enough . . . he looks a lot like Ellie’s grandfather, a scientist who’s always been slightly obsessed with immortality. Could this pimply boy really be Grandpa Melvin? Has he finally found the secret to eternal youth?文章源自：力哥爱英语（ienglish521.com）力哥爱英语-https://ienglish521.com/751.html
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