Sizing Up The Sexes

Scientists are discovering that gender differences have as much to do with the biology of the brain as with the way we are raised

What are little boys made of?

What are little boys made of?

Frogs and snails

And puppy dogs' tails,

That's what little boys are made of.

What are little girls made of?

What are little girls made of?

Sugar and spice

And all that's nice,

That's what little girls are made of.

-- Anonymous

Many scientists rely on elaborately complex and costly equipment to probe the mysteries confronting humankind. Not Melissa Hines. The UCLA behavioral scientist is hoping to solve one of life's oldest riddles with a toybox full of police cars, Lincoln Logs and Barbie dolls. For the past two...

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