Riding a rocket must be incredibly exciting. But it must be even better to zoom on a rocket up to the International Space Station and stay there. Sailing 268 feet above our heads, the ISS celebrates its 15th birthday today. So if you look up in the sky tonight and see it floating by, make sure to give it a “Happy birthday” shout out!
Today is Election Day, when grown-ups get to choose the people they want to have running our government. With the country, each state, and each city and town having its own government, there are a lot of people running for office today and hoping the numbers add up for them!
For a long time the U.S. Post Office delivered only thin letters. So when they first started delivering packages in 1913, people got excited and started mailing all sorts of surprising things.
There are about 320 million Americans – right now, at least. But how many have we ever had? This isn’t the easiest number to figure out. In 2011 one group did just that, though. And the numbers may shock you!
Back when human beings lived in caves, life wasn’t anything like it is now. Cavemen woke up, hunted animals all day, went to sleep, and the next day they started all over, probably without taking a bath. They definitely didn’t have our cool tools, toys and gadgets. But they did make art!
It’s Columbus Day, when America celebrates Christopher Columbus’ famous 1492 trip across the Atlantic Ocean and discovery of America. Actually, he was looking for what they called the East Indies back then. And he didn’t exactly do the math right, luckily for us!
Of all the things you can buy, buying trillions of dollars that can’t be spent on anything might be the weirdest. But sure enough, on Amazon and other sites you can buy old money from Zimbabwe, a trillion dollars at a time. Every country has its own unit of money, called currency (dollars in the US, pounds in Great Britain, and so on).
It’s hard to believe, but at one point sliced bread was actually against the law in the United States. Click “Read More” to find out how long that lasted – and do the banned bread math!
When we count out money to pay for something, usually we don’t study it very carefully – we just add it up. But money has some cool secrets. Click “Read More” to find out about them, and do the money math!
When we look up at our beautiful Moon, we see craters, those big circular dents caused by huge chunks of flying rock smashing into the Moon for billions of years. Well, Earth has craters from meteors and asteroids, too. Click “Read More” to see which celestial body has the greater crater – and do the math!