Whose Egg Is That? Section 50A a poster to hang on

a poster to hang on your wall

And a pair of seriously big

their lives

It's not such a big Worry

The History of the Computer also profiles a diverse range of key players and creators—from An Wang and Margaret Hamilton to Steve Jobs and Sir Tim Berners-Lee—and illuminates their goals

Whose Egg Is That? Section 50A a poster to hang onA nonfiction guessing game that explores the connections between an animal, its eggs, and its habitat. Written by a mammalogist at the Smithsonian, this clever preschool page turner pairs seven eggs with information about the animals' survival mechanisms, asking kids to guess which animal laid which egg. Whose Egg Is That? reveals the animals ranging from penguins to platypuses in their own habitats.