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Heather Adamson
Charles Darwin and the Theory of Evolution
Inventions and Discovery
Heather Adamson
How Do You Measure Length and Distance?
Heather Adamson
How Do You Measure Liquids?
Heather Adamson
How Do You Measure Time?
Measure It!
Heather Adamson
How Do You Measure Weight?
Measure It!
Heather Adamson
The Challenger Explosion
Heather Adamson
The World's Tallest House of Cards and Other Number Records
Wow!
Heather Adamson