Calli Arcale

??"My Very Early Mother Just Served Us Nine Pizzas.” Whatever mnemonic you used, you probably had to learn nine planets.  (Younger readers may be learning just eight!)  But our solar system actually has thousands more planets than that; those are just the

A Norwegian family arrived at their cabin to open it up for the spring and found a surprise: a large rock had smashed through the roof. It was identified as a 1.3 pound breccia meteorite. It didn't hurt anybody, and its sale price should easily cover the

Since before history began, we have tried to understand our world and our place in it. To the earliest hunter-gatherer tribes, this meant little more than knowing the tribe's territory. But as people began to settle and trade, knowing the wider world beca

Doctor Who has a long and noble history of attempting to convey history to its young viewers. It has not always been completely successful, however. Here are a few stories where they dipped into history -- but didn't get the history quite right. The Gunf

Map image via Shutterstock This isn't exactly what tourism bureaus want you to picture when you hear a town or region's name. 1. Guinea Worm A parasitic nematode several feet long, European explorers named it for the Guinea coast of West Africa in the 1

There are eleven Doctors on Doctor Who, right? Well, yes, but not exactly. Those are the "canonical eleven" — the official Doctors. But are you familiar with some of the others? 1. The Dalek Movie Doctor In the mid-60s, Dalek Fever was sweeping England.

Most orbital debris is in low Earth orbit, where "what goes up must come down" — derelict satellites, spent rocket boosters, explosive bolt shrapnel, payload fairings, interstage structures, payload adapters, spin-up counterweights, and more. Most reenter

In January 2012, the newly launched weather satellite NPP Suomi had gathered enough swaths of data to cover the entire Earth. To commemorate this, the mission team assembled this into a map and projected it over the