References

Freemasonry is often misunderstood as a cult or a religion, but it's actually the world's largest fraternal organization with a long and complex history.

Taxonomy is the science of naming, defining and classifying organisms into evolutionarily related groups. It gives biologists a common language.

The Congo River is a long, arcing river in West-Central Africa, featuring a rainforest and providing food and transport for 75 million people.

Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy.

Albatrosses are big, majestic birds found soaring above most of the world’s oceans.

These Y-shaped molecules can precisely target and neutralize viruses, bacteria and other foreign invaders.

Mummification, or the process of preserving the dead, was once a widespread practice among many ancient societies.

Scientists use herd immunity to describe the point at which a population is sufficiently immune to a disease to prevent its circulation.

Take a journey through our solar system.

Located about 66.5 degrees north of the Equator lies the Arctic Circle — a line of latitude that outlines the border of Earth's northernmost region known as the Arctic.

When we don't know enough to know what we don't know.

Written over 200 years ago, the Constitution is a legal document of Articles and Amendments that form the foundation of the federal government, state authority and citizen rights.

Poor planning and a lack of cooperation meant British strategy was destined to fail during the American Revolution.

The American holiday Juneteenth is observed on June 19 and is also known as Emancipation Day and Black Independence Day.

What’s the history of anti-fascism and why is it controversial?

In the early 1950s, Dr. Jonas Salk and Dr. Albert Sabin each found a way to protect the world from poliomyelitis, the paralysis-causing disease commonly known as polio. Here's how they did it.

These spooky costumes may have been worn by some early modern physicians to ward off infection, but the history of plague medicine goes back much further.

An attractive topic.

The Tudor explorer risked everything in his obsessive hunt for gold and glory.