She's certainly far less well known than many of her contemporaries, but Noether's theorem is an incredibly important tool in theoretical physics, and has been described as "certainly one of the most important mathematical theorems ever proved in guiding the development of modern physics, possibly on a par with the Pythagorean theorem". [1]
she was involved in commutative algebra. she had a nice little section in my undergrad abstract algebra book. i'm not saying anything negative about her, just that if you are going to list the most brilliant/productive scientists of all time then shes not going to be on the list. she was brilliant of course.
