Gaining? How many humans can open a panda nut without crushing the kernal? Sounds they are beginning to put some distance between them and us.
I don't know that I can't open a panda nut without crushing the kernel because I've nver done it before. I can, however, guarantee that it would take a whole lot less than seven years for me to learn how to do it.
This is much to-do about nothing. They found some rocks that worked. They use them over and over again. These goofy scientists are acting like the chimps have to be geologists to crack open a nut.