You have all the brain cells you’ll ever have when you reach adulthood. That was the science lesson I was taught in high school from, maybe a misguided teacher, or maybe just misinformed, I do not know. That statement however is not true, we know that the brain is very plastic and ever changing. It’s resilience still amazes us, even today with all that we know about it. Now a previously unknown mechanism through which the brain produces new nerve cells after a stroke has been discovered, showing us just how resilient the brain truly is.