Rivers and lakes are part of the earth's never-ending water cycle. From the Nile, to the Great Lakes, Rivers and Lakes… • how rivers and lakes are formed • flooding around the world More →
Grade 4
2610 records found. Displaying 1813 - 1824.
Wade into rivers and lakes - watery underwater worlds teeming with plant and animal life. These biomes provide a home filled with all the elements their inhabitants need for survival. Peel… More →
The RMS Queen Mary, docked in Long Beach, California, welcomes you aboard…for a good scare! Find out why this beautiful boat makes even the seaworthy shake. Dare to discover why this wild… More →
Disappointed to learn that Americans Peary and Henson had reached the long-sought after North Pole before him, Norwegian explorer Roald Amundsen, set out secretly for the South Pole in 1910.… More →
Known as the Kid President, American teenager Robby Novak thinks it's cool to be kind, and that compassion and curiosity can help change the world. A YouTube sensation and author of two books More →
Robert Pattinson became famous around the world for playing a dreamy vampire in the Twilight movies. The romantic fantasy films have rocketed the British actor to fame. Pattinson is more than More →
For decades, scientists have been working on developing machines that think. Long the subject of science fiction novels and movies, Robot Brains takes an intriguing look at what robotic… More →
Robot Voyagers examines robots built to explore areas on the planet and in space where humans cannot go. Walking robots, for example, venture into volcanoes and crawlers burrow into… More →
Robot systems that include sky-spies and rocket-firing aircraft have moved the science fiction of yesterday into the reality of warfare today. Robot Warriors examines the use of robots in… More →
Robot Workers reveals that, while most of us still do our own chores, that vision of the future is finally becoming a reality in the form of robotic vacuums and lawn mowers.It also shows us… More →
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