Flu shot facts & side effects By Rachael Rettner The seasonal flu shot is a yearly vaccine administered to protect against the flu, or influenza. In the United States, flu shots are recommended for everyone ages 6 months and older.
Raising the flag on Iwo Jima: Here's the story behind that iconic World War II photo By All About History, Tom Garner On Feb. 23, 1945, six Marines raised the U.S. flag over the Japanese island of Iwo Jima. Their photo is one of the most iconic images of World War II.
Mary Anning: Life and discoveries of the first female paleontologist By Rachel Kaufman Mary Anning's discoveries shocked the 19th-century scientific establishment. But her gender, poverty and lack of formal education meant she often didn't get credit for her work.
The Battle of Iwo Jima: A gruesome victory for the Allied Forces By All About History, Tom Garner Fought on a tiny volcanic island 76 years ago, this brutal clash between American and Japanese forces defined the horror of the Pacific theater.
Malcolm X: Life and legacy of the fierce civil rights campaigner By All About History This political activist and minister challenged the conventions of race and religion during the early years of the civil rights movement.
What is the cosmological constant? By Adam Mann What we know about the history and properties of "Einstein's biggest mistake," the cosmological constant
What is ozone? By Adam Mann Exploring the molecule known as ozone, which can both protect and harm us here on Earth.
What is plate tectonics? By Becky Oskin, Tiffany Means Blame plate tectonics for Earth’s mountains, earthquakes, volcanoes, and why its continents fit together like pieces of a giant jigsaw puzzle.
How many people are in the world? By Holly Secon You may think of the global population as a massive, exponentially-growing number of people that threaten to use up all of the world's resources, but that's not the case.
Inauguration day: Why presidents must wait 2 months to start By Kacey Deamer Here's why inauguration day occurs months after an election.
How does impeachment work? By Stephanie Pappas Will President Trump be impeached? Here's a look at what impeachment means, how it works and who has been impeached.
What is a coup? By Mindy Weisberger A coup d'état, which translates as "stroke of the state," can be triggered by military actions, the involvement of foreign governments, or popular revolts.
What is the 25th amendment? By Kimberly Hickok The 25th amendment clarifies the steps to be taken if the offices of president or vice president become vacant.
What is renewable energy? By Sarah Wild Sustainable sources of energy are renewable and are generally less harmful to the environment than fossil fuels.
What was the Star of Bethlehem? By All About Space magazine According to the New Testament, the Star of Bethlehem led the three wise men to Jesus' birth. Here are a few theories about what the star really was.
Top 10 deadliest natural disasters in history By Stephanie Pappas, Tiffany Means Here are the world's most deadliest earthquakes, cyclones and floods.
Flying fish: Real fish, but not really flying By Sarah Wild Key facts and information about flying fish.
Who was Carl Linnaeus? By Tom Garlinghouse Carl Linnaeus, the famous 18th century Swedish botanist, created the basic foundation on which the modern binomial classification system is based.
