Gemstones are more than just pretty rocks. These stones serve a purpose far beyond jewelry or decora... more

An accomplished lawyer and dedicated public servant, Michelle Obama goes far beyond the title of Fir... more

Orange you glad monarchs have such bright wings? They warn predators of the butterflies terrible ta... more

The yellow boxfish is an adorable, friendly-looking ocean dweller - but its vivid color is a warning... more

A beluga whale swims among the icebergs. It s hard for predators to spot in this snowy environment F... more

You save money when purchasing bundled products. This bundle contains the loose-leaf version of The American System of...... more

Doctors are important members of the community. People come to them to seek help for illnesses and i... more

Every day, students across the globe learn the skills and knowledge needed to live and work in their... more

Rain or shine, it is the duty of mail carriers to pick up and deliver letters, packages, and more. M... more

As they patrol streets and neighborhoods, police officers enforce laws and stop crime. They make com... more

The city in the clouds, Machu Picchu, has an air of mystery surrounding it. Historians know the site... more

Fireflies are among nature s tiniest luminaries. They are special in their ability to light up and b... more

Damselflies could very well be part of the inspiration for the term bug-eyed. Their compound eyes ... more

Ladybugs are pest control workers in bright, polka-dotted uniforms. These little exterminators take ... more

Nearly as large as a school bus, humpback whales are a sight to see! Near the surface, these giants ... more

Jellyfish are graceful, beautiful ocean animals. But their looks are deceiving. Those long, wavy ten... more

With tuxedo-like markings on their coats, Boston terriers always look ready for a black tie event. A... more