Sleep-deprived parents want to quiet a fussy baby for a safe and sound slumber. Harvey Karp, author of "The Happiest Baby on the Block," has just the trick.

Following these steps will help ensure that your baby becomes a sound sleeper: Start at the right age. Most experts agree that 6 months is a good age to start sleep training.

Silence rather than sound is stopping Gen Z from sleeping well — here are the best science-backed sleep sounds. ... while just 32% of baby boomers rely on sound aids to sleep.