Charts the beginning of Christianity and its hold on members of the faith as well as the countless struggles for power, the building of the Vatican and creation of the Sistine Chapel, and the Secret Archives that hold papers the church has accumulated over the centuries.

In 1978, Sally Ride, a PhD candidate at Standford University, responded to a newspaper ad to join the US astronaut program. She was accepted and became the first American woman astronaut to fly in space! Among her other accomplishments, she played tennis like a professional, was an astrophysicist who helped develop a robotic arm for space shuttles, and later, through Sally Ride Science, worked to make science cool and accessible for girls. Sally Ride,...

Travel back to the time when the mighty dinosaurs ruled the earth.
The Age of Dinosaurs began about 250 million years ago. In the beginning they were quite small but over time they evolved into the varied and fascinating creatures that captivate our imaginations today. What we know about dinosaurs is evolving, too! We've learned that some dinosaurs were good parents, that dinosaurs could grow new teeth when old ones fell out, and that most...