朋友刘旭离开这个世界7年又7天了，天堂里不会再有意外。
出生于上海本科毕业于复旦大学的刘旭，是位极有天赋才华的神经科学家。他从贝勒医学院拿到博士之后，去MIT从师诺贝尔奖得主，Susumu Tonegawa（利根川进）。其研究成果被评为2014年美国十大创新。他跟合作者介绍自己演讲的2次TED演讲，累积观众过百万。
2015年2月8日，刚刚到西北大学报道助理教授的刘旭，去了另一个世界。
惊闻噩耗的时候，有人希望有能力能以他的名字建立一个科学基金，但是这个目标太遥远。就用我们平台传播一下他的科普演讲，纪念这位只有37年短暂的人生，却帮助影响过许多人，有无穷尽的科学想象力和创造力，留下丰富而精彩足迹的人。
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（以下是英文导读，欢迎分享英文平台）
In Memory of Xu Liu | TED talk - How to manually change a memory
Liu,Xu passed away 7 years at the age of 37. He was a talented scientist and employed as a postdoctoral associate in the Nobel Prize laureate Susumu Tonegawa's lab. He relocated to Chicago to join Northwestern University's Department of Neurobiology as an Assistant Professor.
His collaboration with MIT graduate student Steve Ramirez was recognized by a 2014 Smithsonian Ingenuity Award in Natural Sciences. Xu and Steve’s groundbreaking research documented the ability to not only artificially reactivate specific memories in the brain, but also to create false memories. Using optogenetics and lab mice, the two scientists manipulated cells that are activated during formation of fear memories to implant a new memory of an event that never happened.
The team’s TED talks regarding this work have generated nearly one million views. This video added Chinese subtitles. https://youtu.be/ziv4Ju8mO_A