Ever wonder why you prefer to have an even number on the volume dial rather than leaving the TV's sound on, say, 73? While many write this quirk off as a minor OCD habit, our emotional ties to numbers ...

Most visitors to restaurants arrive in even-numbered groups: a table for two, table for four. Most appetizer nibbles at restaurants arrive in odd numbers: five fritters, nine slices of crudo, three ...

Humans are so smart that we can easily learn the difference between even numbers and odd numbers. And until a new study emerged, humans believed we were the only species capable of this feat, known as ...