Encyclopedia Categories
Today in context,
September 23, 2021
Secret Service Code Names
One of the many perks of being president of the United States is getting a code name. Can you guess the president by his Secret Service moniker?
Eagle
Some have speculated that the name was inspired by the president’s association with the Boy Scouts.
Searchlight
This is one of the more ironic monikers given the president’s attempts to cover up a scandal.
Deacon
The recipient of this code name continued to teach Sunday school while in the White House.
Mogul
This president once stated that he’d pick the name “Humble.” Alas, the Secret Service opted for something that was…well, not so humble.
Celtic
The president behind this name also used it when he was vice president.
Timberwolf
Unfortunately, it is unknown why this president was named for the largest member of the dog family.
Renegade
This history-making president reportedly picked his moniker from a list of code names that started with “R.”
Last of the Jovian Planets
Neptune was discovered on September 23, 1846. It was the second planet (after Uranus) to be found using a telescope. Although German astronomers Johann Gottfried Galle and Heinrich Louis d’Arrest were the first individuals to accurately identify Neptune in the night sky, the planet’s “discovery” was eventually credited to British mathematician John Couch Adams and French astronomer Urbain-Jean-Joseph Le Verrier. Adams and Le Verrier had independently predicted the existence and location of Neptune prior to its direct telescopic observation.
Podcasts
See All Shows And Podcasts
Postcards from the 6th Mass Extinction
So far there have been five notable mass extinctions on Earth. A growing number of scientists argue that we’re now in the midst of a sixth. Postcards from the 6th Mass Extinction is a podcast hosted by John P. Rafferty that attempts to personalize extinction, emphasizing the survival challenges that familiar forms of life currently face, while at the same time considering the pivotal roles they play in their own ecosystems.
Botanize!
Botanize!, hosted by Melissa Petruzzello, is a podcast that will introduce you to some of the world’s most remarkable plants, fungi, and algae. These overlooked organisms have fascinating evolutionary stories to tell about survival, exploitation, adaptation, and general scrappiness, and every episode will pique your curiosity. From parasitic plants to kelp forests, Botanize! aims to showcase some of Earth’s finest nonanimal life-forms and their brilliant ecologies.
Show What You Know
Informative and lively, Show What You Know is a quiz show for curious tweens and their grown-ups from Encyclopædia Britannica. Hosted by author Christopher Lloyd, each episode gives three middle-grade contestants a chance to go head to head with questions about the earth, the universe, ancient history, and more from the Britannica All New Kids’ Encyclopedia: What We Know & What We Don’t.
Hispanic Heritage Month
Why Does National Hispanic Heritage Month Start in the Middle of September?
The celebration was created to align with the independence days of a number of Latin American countries.
Who Are Hispanic Americans?
Hispanics make up the largest ethnic minority in the United States, forming nearly one-fifth of the country’s population.
Browse by Category
Entertainment & Pop Culture
Entertainment and leisure activities have been a part of all cultures in one form or another since the ancient times, whether the activity in question involved participating in a dance performance, attending a Broadway show, going to a music festival, or watching a movie.
Featured
-
Rock
music
-
James Bond's Gadgets
James Bond, British superspy and international man...
-
7 Delicious Fruits That Made Their Way to California (and How They Did It)
How many have you tried?
Geography & Travel
Planet Earth contains some extraordinarily diverse environments, some of which are easily habitable and some not so much. In different areas of Earth, one might find sweltering deserts, dense tropical rainforests, or bone-chilling tundras. Each biome and habitat comes with its own selection of flora and fauna, and it may include physical features such as canyons, volcanoes, rivers, or caves. Human beings have built homes in many different environments, settling the area and organizing it into units such as cities, states, regions, and countries, each with its own points of interest. Shifting trends in human migration have resulted in a human geography that is profoundly different from that of centuries ago.
Featured
-
Cave
geology
-
21 Tombs Around the World
Know before you go.
-
6 Significant Hospitals
Every building has a story.
Health & Medicine
The study of the human mind and body, how these function, and how they interact—not only with each other but also with their environment—has been of utmost importance in ensuring human well-being. Research on potential treatments and preventive medicine has expanded greatly with the development of modern medicine, and a network of disciplines, including such fields as genetics, psychology, and nutrition, aims to facilitate the betterment of our health.
Featured
-
Poison
biochemistry
-
How Do Face Masks Control the Spread of Disease?
Face masks have long been used for various reasons...
-
What Is a Second Wave of a Pandemic, and Could It Happen for COVID-19?
When a global outbreak of disease begins to slow, people...
Lifestyles & Social Issues
It's easy enough to agree that human beings all around the world have certain basic requirements that must be fulfilled in order to ensure their individual and collective well-being. History has shown us, however, that it's not so easy to form societies or communities that fulfill these requirements for all members. The fight over human and civil rights has persisted for hundreds of years and remains alive today, both within the borders of nations and on an international scale. It has led to large-scale social movements and reforms concerning issues such as suffrage, slavery, women's rights, racial discrimination, environmentalism, gay rights, and more.
Featured
- urban planning
-
New Seven Wonders of the World
See who did—and didn’t—make the cut.
-
The Effects of China’s One-Child Policy
In 1980 China implemented a controversial family-planning...
Literature
With the development of language, the human imagination has found a way to create and communicate through the written word. A literary work can transport us into a fictional, fantastic new world, describe a fleeting feeling, or simply give us a picture of the past through novels, poems, tragedies, epic works, and other genres. Through literature, communication becomes an art, and it can bridge and bond people and cultures of different languages and backgrounds.
Featured
- Western literature
-
The Literary World (Characters Quiz)
The March sisters, Beowulf, and even Tweedledee and...
-
The Literary World
Hey, bookworm! In between reads, try this novel idea:...
Philosophy & Religion
Humans have long pondered not only how we came to be but also why we came to be. The earliest Greek philosophers focused their attention upon the origin and nature of the physical world; later philosophers have theorized about the nature of knowledge, truth, good and evil, love, friendship, and much more. Thus, philosophy involves a methodical assessment of any and all aspects of human existence and experience. The realms of philosophy and religion have sometimes intersected in conducting inquiries such as these. As with philosophy, the study of religion underscores how humankind has long speculated about its origins. The possibility of a higher being (or beings) to which livings things owe their existence has long captived human thought. Many religions also offer their own views on the nature of good and evil, and they may prescribe guidelines and judgment on different kinds of human behavior.
Featured
- Political philosophy
-
St. Paul’s Contributions to the New Testament
Which books of the Bible did he write?
-
What is the Difference Between Daoism and Confucianism?
How do China’s two great philosophical and religious...
Politics, Law & Government
The world today is divided territorially into more than 190 countries, each of which possesses a national government that claims to exercise sovereignty and seeks to compel obedience to its will by its citizens. Governments can be classified in any number of ways. For example, they might be classified by the number of rulers, thus distinguishing government by one (as in a monarchy or a tyranny) from government by the few (in an aristocracy or oligarchy) and from government by the many (as in a democracy). Governments can also be classified by mode of succession; for example, ascension to governmental leadership may follow the rules of hereditary succession, or it may be determined through elections or by force. Governments also vary in terms of the laws and rules of conduct that each political entity follows.
Featured
- Industrial relations
-
5 Remarkably Close U.S. Presidential Elections
How much can one vote matter? A lot.
-
Women’s History: Leaders Quiz
Women have been political leaders for centuries. Test...
Science
How can the sky be blue one day and stormy the next? Why do heavy objects tend to fall downwards when dropped? How are birds able to fly (and why can’t I do the same?)? Human beings have long been curious about the world in which we live, striving to identify connections among the phenomenons we witness and to understand how it all works. The field of science has developed over many centuries as a way of studying and understanding the world, beginning with the primitive stage of simply noting important regularities in nature and continuing through the rise of modern science. The modern-day sciences cover a vast range of fields, including biology, chemistry, meteorology, astronomy, physics, and much more.
Featured
-
radiation
physics
-
How Do Monkeys and Apes Trim Their Fingernails?
Gorillas in the wild can’t get a manicure. So how do...
-
How to optimise your headspace on a mission to Mars
Research on people in prison and solitary confinement...
Sports & Recreation
Physical contests and recreational games have long played a part in human society. In both team and solo sports, the human body has been pushed to its limits in the name of improving athletic performance and to break record upon record. The ancient Olympic Games are an early example of the contests in which humans have engaged to showcase physical prowess. In modern times, sports and games have evolved into a lucrative and competitive industry, while other leisure activities, such as card and video games, can be competitive or can just be a way to unwind or socialize.
Featured
-
gridiron football
sport
-
What Is a Modern Pentathlon?
Grab a sword, a swimsuit, a horse, a gun, and running...
-
7 Significant Political Events at the Olympic Games
The Olympics are a time when international politics...
Technology
Humankind has long striven to improve its living conditions through the development of tools, instruments, and transportation and communications systems, all with the goal of making our lives easier, more productive and—why not—more fun, too! Thanks to human curiosity and technological research, many significant inventions have been made throughout history that in turn made a difference in our daily lives.
Featured
- Agricultural technology
-
Technological Ingenuity
From the first tools of early humans to IBM’s Deep...
-
Gadgets and Technology: Fact or Fiction?
Is virtual reality only used in toys? Have robots ever...
Visual Arts
These are the arts that meet the eye and evoke an emotion through an expression of skill and imagination. They include the most ancient forms, such as painting and drawing, and the arts that were born thanks to the development of technology, like sculpture, printmaking, photography, and installation art, the latter a combination of multiple creative expressions. Though beauty is in the eye of the beholder, different eras in art history have had their own principles to define beauty, from the richly ornamented taste of the Baroque to the simple, utilitarian style of the Prairie School.
Featured
-
Folk art
visual arts
-
Everything in Art and Design (Part One) Quiz
Want to learn a little about nearly everything in art...
-
Everything in Art and Design (Part Two) Quiz
Want to learn a little about nearly everything in art...
World History
Does history really repeat itself, or can we learn from the mistakes of those who came before us? History provides a chronological, statistical, and cultural record of the events, people, and movements that have made an impact on humankind and the world at large throughout the ages. Investigating the causes and results of past events is critically important in gaining a full understanding and perspective of present-day issues.
Featured
-
Byzantine Empire
historical empire, Eurasia
-
Was Napoleon Short?
Find out if the most-known aspect of Napoleon’s legacy...
- How did Patrice Lumumba die?
More From Britannica
ProCon.org
Award-winning ProCon.org promotes critical thinking, education, and informed citizenship by presenting the pro and con arguments to controversial issues in a straightforward, nonpartisan, freely accessible way.
Britannica Beyond
Questions are an important way for people to learn concepts, to solve problems, and to challenge ideas. We’ve created a new place where questions are at the center of our learning. Go ahead. Ask. We won’t mind.
Advocacy for Animals
Presenting Advocacy for Animals, a blog focused primarily on animal rights, wildlife conservation, environmental health and safety, and the legal and cultural issues related to these topics. This blog is a source of information and a call to action. It is meant to be a provocation and a stimulus to thought regarding humanity’s relationship with nonhuman animals.
Alain Elkann Interviews
Alain has been writing a weekly interview column for the Italian newspaper La Stampa since 1989. His interviews celebrate some of the best known and successful personalities of the present day.

