The cell membrane is a highly selective barrier that controls what enters and exits the cell.
The cell membrane is composed of a phospholipid bilayer.
The fluid mosaic model describes the dynamic nature of the cell membrane.
Some cells have specialized membrane proteins that allow for cell-cell communication.
The cell mem... Read More
Brazil is the largest country in South America and the fifth largest in the world.
The Amazon rainforest, located in Brazil, is the largest tropical rainforest in the world.
Brazil has the longest beach in the world, Praia do Cassino, stretching for over 150 miles.
The Brazilian city of Brasília was designed and built in just ... Read More
Bessie Coleman was the first African American woman to hold a pilot's license.
Bessie Coleman was born on January 26, 1892, in Atlanta, Texas.
Despite facing racial and gender discrimination, Bessie Coleman pursued her dream of flying.
Bessie Coleman earned her pilot's license in France, as aviation schools in the United States... Read More
The universe is so vast that even with the most advanced telescopes, we have only scratched the surface of what lies beyond.
There are approximately 100 billion stars in our Milky Way galaxy alone.
The moon is not completely round, but instead, it is shaped like a slightly squashed sphere.
The sun is so massive that it accounts... Read More
Asia is the largest continent by both area and population.
The Great Wall of China is one of the most famous landmarks in Asia.
Did you know that Asia is home to some of the oldest civilizations in the world?
Mount Everest, the highest peak in the world, is located in Asia.
Asia is known for its diverse and delicious cuis... Read More
Aphrodite, the goddess of love and beauty, was known as Venus in Roman mythology.
According to Greek mythology, Aphrodite was born from the sea foam when the Titan Cronus castrated his father, Uranus, and threw his genitals into the sea.
Aphrodite's birthplace is said to be in the island of Cyprus.
Aphrodite had many temples de... Read More
Ancient Greece was the birthplace of democracy.
The Olympic Games originated in ancient Greece and were held to honor the Greek gods.
Greek philosophy, with prominent thinkers such as Socrates, Plato, and Aristotle, laid the foundation for Western philosophy.
Greece is known for its iconic ancient ruins, including the Parthenon... Read More
Ancient Egypt was one of the greatest civilizations in history.
The Great Pyramid of Giza is the oldest and largest of the Seven Wonders of the Ancient World.
Cleopatra, the last pharaoh of Egypt, was actually of Greek descent.
The ancient Egyptians invented paper and writing with hieroglyphics.
The Nile River was the lif... Read More
Ancient China is one of the oldest civilizations in the world.
The Great Wall of China is one of the most iconic structures in ancient China.
The art of paper-making originated in ancient China.
The Chinese invented gunpowder and used it for fireworks and weapons.
Silk was an important trade commodity in ancient China. Read More
Alkaline earth metals are a group of metals on the periodic table.
The alkaline earth metals include beryllium, magnesium, calcium, strontium, barium, and radium.
They are called alkaline because they form alkaline (basic) solutions when they react with water.
The alkaline earth metals have two valence electrons in their outerm... Read More
Alice Paul was a prominent American suffragist and women's rights activist.
She was born on January 11, 1885 in Mount Laurel, New Jersey.
Alice Paul was instrumental in the passage and ratification of the 19th Amendment, which granted women the right to vote.
As a young woman, she spent time in England and was influenced by the... Read More
Did you know that dinosaurs roamed the Earth millions of years ago?
Some dinosaurs were huge, like the mighty T-Rex!
But not all dinosaurs were big; some were as small as chickens.
Dinosaurs lived during the Mesozoic Era, which is also known as the Age of Dinosaurs.
The word dinosaur comes from Greek and means terrible li... Read More
Dia de los Muertos, also known as the Day of the Dead, is a vibrant Mexican holiday that celebrates and honors loved ones who have passed away.
This unique holiday takes place on November 1st and 2nd each year.
Despite its name, Dia de los Muertos is not a sad or somber occasion, but rather a joyous celebration of life.
Mexican... Read More
Louis Armstrong was born on August 4, 1901, in New Orleans, Louisiana.
Armstrong was nicknamed Satchmo due to his large mouth and cheeks, which resembled a satchel.
He grew up in poverty and had a difficult childhood, often supporting himself through odd jobs and street performances.
Armstrong's first instrument was a cornet, w... Read More
Did you know that baby elephants suck their trunks just like human babies suck their thumbs?
Koalas have unique fingerprints, just like humans.
A group of flamingos is called a flamboyance.
Sloths move so slowly that algae can grow on their fur, giving them a greenish color.
Puffins mate for life and always come back to t... Read More
Coral reefs are the rainforests of the ocean.
Coral polyps are tiny animals that create coral structures.
Coral can take hundreds of years to form.
Coral reefs are home to more than 25% of all marine life.
Coral reefs are some of the most diverse ecosystems on Earth.
Coral reefs provide a natural barrier against sto... Read More
The brain is the most complex organ in the human body.
The human brain weighs about 3 pounds.
The brain contains about 100 billion neurons.
The brain uses about 20% of the body's total energy.
Memories are not stored in one specific area of the brain.
Your brain generates enough electricity to power a light bulb. Read More
Did you know that humans share 50% of their DNA with bananas?
The blue whale is the largest animal ever known to have existed, with a heart the size of a car!
Your brain uses about 20% of your body's total oxygen and blood supply.
The average human will produce enough saliva in their lifetime to fill two swimming pools.
A... Read More
The Bermuda Triangle is known for its mysterious disappearances.
The Bermuda Triangle has been a subject of fascination for decades.
The Bermuda Triangle is located in the western part of the North Atlantic Ocean.
Flight 19, a squadron of five torpedo bombers, vanished in the Bermuda Triangle in 19
5. The Bermuda Triangle... Read More
The bald eagle is a powerful bird known for its majestic appearance.
Bald eagles are found primarily in North America.
This bird is not actually bald, but it has white feathers on its head that give it the appearance of being bald.
Bald eagles have a wingspan of about 6 to 8 feet, making them one of the largest birds of prey in... Read More
Workers of the world, unite! The history of all hitherto existing societies is the history of class struggles. The bourgeoisie
Read MoreSuccess is not determined by how many times you fall, but by how many times you get back up. Never
Read MoreHungary is home to the largest thermal water cave system in the world. The Rubik’s Cube was invented by Hungarian
Read MoreFireworks are the sparks of joy in the night sky. As the fireworks explode, so does my excitement. Fireworks are
Read MoreAmsterdam is more than just canals and bicycles – it’s a state of mind. In Amsterdam, the streets are filled
Read MoreJealousy is a self-destructive emotion that only eats away at the jealous individual. Haters only hate what they can’t have.
Read MoreThe energy you give to others will always come back to you. When you radiate positivity, you attract positive energy
Read MoreHurricane Katrina was one of the most powerful hurricanes to make landfall in the United States. The storm formed over
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