Researchers have trained rhesus macaque monkeys to recognize two sets of symbols, with 26 symbols in each set. And the monkeys demonstrated an ability to add them together!

These basic symbols aren't just for elementary math. They appear in every branch of mathematics, from algebra to calculus, making them your lifelong companions in mathematical problem-solving.

It has been long thought that one of the characteristics that makes humans unique is our ability to learn and manipulate symbols for communication. However, this notion is starting to slowly unravel.