Mark Mancini

There are many types of energy in the world, from potential and kinetic to electrical and thermal, along with many others. But what exactly is energy?

By Mark Mancini

June 21 marks the summer solstice, the longest day of the year. Here are five cool facts about it.

By Mark Mancini

Utahraptors lived around 135 million years ago in the late Cretaceous Period. So what does salt have to do with these massive dinosaurs whose fossils were first discovered in 1975?

By Mark Mancini

Helmets, battles, Leif Erikson Day - our new Viking quiz has it all. Grab some mead and let's get started.

By Mark Mancini

Even washed up on the beach, the Portuguese man-of-war can deliver searing pain with its stinging tentacles, so whatever you do, don't touch it.

By Mark Mancini

With a little patience, you can master this trick of converting binary code to decimals — and have fun doing it!

By Mark Mancini

Brought to life on the screen by Alexander Skarsgård, the story of Amleth the Viking was the inspiration for Shakespeare's "Hamlet." But who was Prince Amleth and did he actually exist?

By Mark Mancini

The elusive hagfish is a master at hiding in holes and crevices, but its main defense is its ability to release a noxious, suffocating and sometimes poisonous slime when attacked.

By Mark Mancini

Earth is a complex place, and its climate follows suit. That may explain why many of us are still confused about climate change. Think you can tell the facts from myths? Find out with this quiz.

By Mark Mancini

Every April, the Lyrid meteor shower fills the sky with shooting stars. Here's how to see them in 2022.

By Mark Mancini

Sriracha is spicy and tangy but not super hot. That's why so many people love it. It never overpowers foods; it just complements them.

By Mark Mancini

In 1984, President Ronald Reagan had a vision for a permanently inhabited space station. Today that vision is a reality we know as the International Space Station.

By Craig Freudenrich, Ph.D. & Mark Mancini

Dimetrodon may look for all the world like a dinosaur, but was actually closer, evolutionarily speaking, to humans. Scientists are still trying to figure what their magnificent sails were used for.

By Mark Mancini

Since it launched Aug. 12, 2018, NASA's Parker Solar Probe has made 11 of the 24 planned approaches with the sun, analyzing the massive star's solar wind and magnetic fields. But just how close will it get to our solar system's massive star?

By Mark Mancini

It made geographical sense for Russia to sell its territory of Alaska to Canada, but it opted to sell it to the U.S. instead. Why was that?

By Mark Mancini

Your eyes aren't playing tricks on you. Those mountains way off in the distance really do look blue, and it's because of how light wavelengths scatter in the atmosphere.

By Mark Mancini

The spring, or vernal, equinox traditionally marks the first day of spring — but climate scientists use a different date altogether. Find out more about this and other facts about the spring equinox.

By Mark Mancini

Don't let its name — or strong aroma — turn you off. Fish sauce is a savory sauce used in Southeast Asian cuisine, and we promise if you try it, you'll never let your kitchen be without it.

By Mark Mancini

Both degrees and radians represent the measure of an angle in geometry. So, how do you convert one to the other?

By Mark Mancini

Anne Bonny was an Irish marauder whose brief period of piracy in the 18th century Caribbean enshrined her in legend as one of the few documented female pirates in history.

By Mark Mancini

Most of the world uses meters, apart from the U.S. and a few other countries. So what's an easy way to convert from meters to feet and vice versa?

By Mark Mancini

You might not think a worm could be longer than a whale, but allow us to introduce you to the bootlace worm, one of the longest animals on the planet. And, oh and it packs a potent toxin, too.

By Mark Mancini

Converting kilogram measurements into pounds is not hard. We'll show you the textbook way plus two quick-and-dirty shortcuts.

By Mark Mancini

NASA announced it will "retire" the International Space Station in January 2031. The plan is to plunge the lab into the deep waters of a place called Point Nemo. But where in the heck is that?

By Mark Mancini

Human bones were found in the basement of Benjamin Franklin's London home. Lots of human bones. Was one of America's most venerated Founding Fathers a criminal of the worst kind?

By Diana Brown & Mark Mancini