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!

State symbols like official birds ... When it comes to state mammals, not every state thinks the same. Some list state animals, some specify state mammals and some even include land and ocean ...

Beyond plants and animals, further categories found in nature are also present among N.C.'s long list of official symbols including: See the North Carolina site named among USA TODAY’s Most ...