A look at the causes and global effects of the 1945 atomic bombardment of two Japanese cities, which led to the end of World War II but set the stage for hostilities in the Cold War era.
A look at a common food chain in a South American rainforest, introducing the cacao tree that starts the chain, the jaguar that sits atop the chain, and various animals in between.
A look at a common food chain on a North American prairie, introducing the bluestem grass that starts the chain, the badger that sits atop the chain, and various animals in between.
A look at the causes and global effects of the 1789 storming of the Bastille and subsequent decade-long revolution, which toppled a monarchy but paved the way for Napoleon’s rise to power.
A look at a common food chain in the Pacific Ocean, introducing the plankton that starts the chain, the killer whale that sits atop the chain, and various animals in between.
A look at the causes and global effects of the World War II Nazi campaign against Jews and other groups of people, which led to millions of deaths and the creation of a Jewish homeland.
A look at a common food chain in a North American desert, introducing the mesquite tree that starts the chain, the coyote that sits atop the chain, and various animals in between.
A look at a common food chain in the Rocky Mountains, introducing the ponderosa pine tree that starts the chain, the mountain lion that sits atop the chain, and various animals in between.
A look at a common food chain in the Arctic tundra, introducing the Arctic willow that starts the chain, the wolf that sits atop the chain, and various animals in between.
An account of espionage during the modern age, including famous spies such as Dayna Williamson Baer, covert missions, and technologies that influence the course of present-day conflicts.
A helpful guide for understanding the mathematical concepts and real-world applications of graphs and diagrams, including classroom tips, common terms such as variables, and exercises to encourage hands-on practice.
An in-depth look at the people and policies behind the government agency known as the NTSB, from its founding in 1967 to the controversies and challenges it faces today.
An exploration of Grand Teton National Park, including how its mountainous landscape was formed, its history of preservation, and tourist attractions such as the waterfall known as Hidden Falls.
