Emma Carlson Berne

"Discusses Earth as a part of the solar system, including ancient astronomers' research that changed the way Earth was understood, explorations outside of Earth's atmosphere, and the possibility of sending humans to other planets"--

"On the Fourth of July, Americans remember the founding of the United States. On this day, people gather for picnics and watch parades and fireworks. Sing along [with the scannable app] as you explore [this annual tradition]"--Back cover.

Exlpains how small pine cones grow into majestic, tall trees.

The What Do We Know About? series explores the mysterious, the unknown, and the unexplained. Why was Sarah Winchester's puzzling mansion built with so many mysterious features? And is it truly haunted?
In 1884, Sarah Winchester began building a large mansion in Santa Clara County, California. Under Sarah's direction, the house rose to be seven stories high and filled with mysterious features, including stairs that lead to nowhere and windows...

Seaside Sanctuary is supposed to be a safe place for marine animals, but suddenly dolphins are getting sick-and no one can explain why. Since Elsa Roth spends all of her time at the sanctuary, a perk of her parents' jobs there, she's well acquainted with all the animals. Elsa is especially worried about Star, a young dolphin she bonded with after seeing him in his wild pen. When the crisis intensifies, it's up to Elsa to get to solve the mystery before...

The American Revolution is raging in Philadelphia, and Rebecca is determined to do all she can to help. With her father stationed with Washington's army at nearby Whitemarsh, it's up to Rebecca to help her mother at home with her younger siblings. That includes selling vegetables to British officers stationed in wealthy houses nearby. When Rebecca intercepts a message about an impending British attack against the Patriots from one such house, she...