Patricia Bath

At, at 70 years old she got her PhD.

But so there's, you know, whether it's cataract, uh, laser surgery from Dr. Patricia Bath, whether it's, uh, Otis Boykin and the, uh, pacemaker for the heart, whether it's the refrigerator, whether it's, uh, the Real McCoy, Elijah McCoy, who created, uh, so many inventions that really helped to build the Industrial Age.

He created a self-lubrication mach- uh, mechanism that they would put into machines.

And if you think about you have a machine that's working X amount of hours.