(acoustic guitar music) ♪ Good morning to a brand new day ♪ ♪ Time to learn and the games to play ♪ ♪ Learning things is so much fun ♪ ♪ Learning is good for everyone ♪ (acoustic guitar music) (upbeat ...

A change in ancient diet may have altered the way humans speak, and potentially spawned an increased use of words that include “f” and “v” sounds, says a new study that may offer insights into the ...