What Do Babies Know?

COVER STORY

What Do Babies Know?

More than many realize, and much earlier, according to new research

Fantastic!" says Michael Lewis, a small, spry man with a gray-flecked beard. "This is great!"

What inspires such glee in Lewis is that two small and curly-haired sisters named Danielle and Stacy, ages twelve and 14 months, are starting to cry. The sound is heartrending, but not to Lewis.

"Exactly what we expected," he says cheerily as the girls' parents arrive to comfort them. The wailing soon subsides. Lewis, 46, is not a sadistic Scrooge; on the contrary, he is...

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