A basic exploration of the parts, variations, and worksites of excavators, the big digging machines. Also included is a pictorial diagram of variations of excavators.
An elementary exploration of canyons, focusing on the geological evidence that helps explain how and where they form and spotlighting famous examples, such as Arizona’s Grand Canyon.
A basic exploration of the parts, variations, and worksites of cranes, the tall moving machines. Also included is a pictorial diagram of variations of cranes.
A basic exploration of the parts, variations, and worksites of backhoes, the digging and hauling machines. Also included is a pictorial diagram of variations of backhoes.
A basic exploration of the parts, variations, and worksites of concrete mixers, the cement-mixing machines. Also included is a pictorial diagram of variations of concrete mixers.
A kindergarten-level introduction to grasslands, covering their climate, plant and animal life, and such defining features as their varied grasses.
A kindergarten-level introduction to wetlands, covering their climate, plant and animal life, and defining features.
A kindergarten-level introduction to tow trucks, covering their purpose, where they are found, their drivers, and such defining features as their booms and winches.
A kindergarten-level introduction to the large trucks known as big rigs, covering their purpose, drivers, and such defining features as their tractors and trailers.
An elementary exploration of dire wolves, focusing on fossil evidence that helps explain how their shaggy hair, strong jaws, and sharp teeth helped these beasts adapt to the last Ice Age.
An elementary exploration of monster birds, focusing on fossil evidence that helps explain how their wide wings and long feathers helped these beasts adapt to the last Ice Age.
An elementary exploration of giant short-faced bears, focusing on fossil evidence that helps explain how their long legs and wide snouts helped these beasts adapt to the last Ice Age.
An elementary exploration of stag-moose, focusing on fossil evidence that helps explain how their wide antlers and sharp hooves helped these beasts adapt to the last Ice Age.
An elementary exploration of saber-toothed cats, focusing on fossil evidence that helps explain how their sharp, curved teeth and short legs helped these beasts adapt to the last Ice Age.
An elementary exploration of mammoths, focusing on fossil evidence that helps explain how their big tusks and shaggy fur helped these plant-eating beasts adapt to the last Ice Age.
A basic exploration of the appearance, behavior, and habitat of iguanas, the North and South American dewlapped reptiles. Also included is a story from folklore explaining why iguanas live in trees.
A kindergarten-level introduction to mountains, covering their climate, plant and animal life, and such defining features as their rocky peaks.
A kindergarten-level introduction to oceans, covering their climate, plant and animal life, and such defining features as their salty water.
A high-interest introduction to the size, speed, and purpose of one of the world’s largest passenger ships, including a brief history and what the future holds for the Oasis of the Seas.
A high-interest introduction to the size, speed, and purpose of one of the world’s largest mobile machines, including a brief history and what the future holds for the Overburden Conveyor Bridge F60.
A high-interest introduction to the size, speed, and purpose of one of the world’s largest excavators, including a brief history and what the future holds for the Krupp Digging Machine.
An elementary introduction to the physics involved in the sport of soccer, including scientific concepts such as spin and friction, and actions such as dribbling and kicking.
An elementary introduction to the physics involved in the sport of volleyball, including scientific concepts such as gravity and acceleration, and actions such as bumping and spiking.
An elementary introduction to the physics involved in the sport of golf, including scientific concepts such as torque and lift, and actions such as swinging and twisting.
An elementary introduction to the physics involved in the sport of football, including scientific concepts such as mass and projectile motion, and actions such as tackling and punting.
