The biology of bonding unravels to reveal how caregiving, social interaction and stress can physically change both parent and newborn.

From how they grow to how they go, three scientists find out that crawling is much more than just a transitional phase.

Several experts make sense of how babies touch, taste and see as they embark on a sensory journey that will shape the rest of their lives.

Researchers reveal the social skills that toddlers naturally possess, abilities that ultimately separate humans from all other species.

Experts examine the rhythm and flow of language and explore how babies break down linguistic beats before they know how to speak.

Scientists venture into the ways that walking changes a baby's world and unveil findings on neonatal reflexes, skeletal development and talking.

Researchers delve into sleep, a dynamic time for babies, with studies on twitching, apps and naps.

Resolving the debate of nature versus nurture, three scientists show how genetics and environment work together as infants discover who they are.

Proving babies truly are what they eat, researchers discuss how breast milk, iron and microbes can enrich, nourish and protect offspring.

Challenging the notion of a blank slate, three studies explore how babies are born with expectations about everyday life.

From curiosity to understanding: researchers unveil the surprising ways that infants learn how to anticipate and respond to the movements of others.

A coy smile, a puppet show and a pointed finger lead to discoveries in how babies get along with others using humor, morality and shared experiences.