I had a birthday about a month ago, and with that birthday I entered a new decade. I won’t reveal which decade, but let’s just say that my age is starting to really hit me. I am not old, but I am not young either. And this led to me reflecting on what I’ve done in my life. There are so many things that I have accomplished, but there are so many things I still want to accomplish. But am I now too far along to still achieve certain dreams? If I look closely at the world of mathematics, the message seems to scream “Yes!” After all, the top prize of mathematics, the Fields Medal (like a Nobel Prize for mathematics), is only awarded to people under the age of 40 years. So, what does that mean? Are the people who established the prize saying that mathematicians cannot possibly be noteworthy after reaching that particular age? It sure feels that way.

But, just as I was experiencing a decline in hope, I thought about what some have done well past that point. Take Yitang Zhang, for example. A colleague shared the story of this quiet mathematician, who had a Ph.D. but struggled to get a university position. His struggles were so stark that he spent time building sandwiches at Subway and sleeping in his car. But, he never let his circumstances distract him from his work. Tirelessly and silently, he plugged along in his research. Then, he astounded the world of professional mathematicians with his discovery regarding the Twin Prime Conjecture. (The Twin Prime Conjecture says that there are an infinite number of pairs of primes that differ by 2, such as 3 and 5 or 11 and 13.)

Zhang didn’t prove the conjecture outright, but he made huge progress in narrowing down how often prime pairs occur. He didn’t show that there are infinite pairs with a difference of 2, but he did say that there are infinite pairs with a difference less than 70 million. I know this doesn’t sound impressive at first, but he showed that we can start narrowing down pairs into infinity. And this was the foundation needed by other mathematicians to build upon and narrow down the gap even further. Suddenly, Zhang was a sensation! It was not too late! He prefers to avoid the limelight and continue working in the quiet, but he now has a prestigious university position and a place in mathematics history. And this happened in his 50’s! It is too late for a Fields Medal, which is a shame. But it is not too late to achieve. And that gives me hope.

Why do I need this hope? Well, I am a teacher of many non-traditional students. Adults come into my classrooms, hoping to reinvent themselves in later years. Often, they are older than me. And I am in awe of the sacrifices these people make to improve the lives of themselves and their families. They are reaching for their dreams and achieving, not allowing age to stand in the way. I watch my own students and draw inspiration from them. But, I still wonder if I can do the same. Is it possible in my chosen field? And figures such as Yitang Zhang tell me that it is wholly possible and never too late.

*Recently, *Quanta* magazine highlighted the places that some top researchers visit to do their deepest thinking. I particularly like Zhang’s location and dream of one day being there, too.

Yitang Zhang at the Beach in Santa Barbara