Inventions & Discoveries
Invented in 1876, this device revolutionized communication and was first successfully demonstrated by Alexander Graham Bell.
A: The telephone
A group of lions is known by this specific term.
A: A pride
This civil rights leader delivered his famous "I Have a Dream" speech on the steps of the Lincoln Memorial in 1963.
A: Martin Luther King Jr.
This national monument, located in South Dakota, features the faces of four U.S. presidents carved into the rock.
A: Mount Rushmore
: The largest organ of the human body is this.
A: The skin
This Scottish scientist discovered penicillin, the world's first antibiotic, in 1928.
A: Alexander Fleming
The only mammal capable of true, sustained flight is this animal.
A: The bat
This Italian painter, sculptor, and architect is famous for his work on the ceiling of the Sistine Chapel.
A: Michelangelo
Standing over 300 feet tall, this iconic statue was a gift to the U.S. from the people of France.
A: The Statue of Liberty
The femur is the scientific name for this large bone in the human body.
A: The thigh bone
The lightbulb was a major invention, but what was a key innovation that made it commercially viable?
A: The long-lasting filament
The fastest land animal on Earth is this large cat.
A: The cheetah
As the first woman to fly solo across the Atlantic Ocean, she was a pioneering aviator.
A: Amelia Earhart
This historic building in Philadelphia is where the Declaration of Independence was signed.
A: Independence Hall
What is the average number of bones in an adult human body?
A: 206
In 1947, this camera, invented by Edwin Land, allowed people to take and develop a photograph in under a minute.
A: The Polaroid camera
This large mammal is famous for its long-distance migration, traveling thousands of miles to find food and a mate.
A: The humpback whale (or whale)
Known as the "Iron Lady," she was the first female prime minister of the United Kingdom.
A: Margaret Thatcher
Located in Arizona, this massive natural wonder was carved by the Colorado River over millions of years.
A: The Grand Canyon
This organ is responsible for filtering blood and producing bile to aid in digestion.
A: The liver
The first successful commercial demonstration of this kitchen appliance, which uses electromagnetic radiation, occurred in the late 1940s.
A: The microwave oven
: The venomous bite of this Australian snake is considered the most potent of any land snake.
A: The inland taipan
This Greek philosopher was the student of Socrates and the teacher of Aristotle.
A: Plato
The monument known as "The Needle" is the most prominent landmark of this U.S. capital city.
A: The Washington Monument
This is the only muscle in the human body that never gets tired.
A: The heart