You might have heard that Earth is due for a complete flip of its magnetic field. And while our planet does have a history of this behavior, predictions of when it might happen are too complex to estimate a date for.

At this moment, three hundred million women across the planet are experiencing the same thing: a period. The monthly menstrual cycle that gives rise to the period is a reality that most women on Earth will go through in their lives. But...

In this video Paul Andersen explains in more detail the history of the Earth. He shows how the history of the Earth is written in the rocks that are built up over time. Fossils allow us to compare different rock layers relative to one...

Most People Don’t Know This About Antarctica… Do You?

Did you know that China's fascinating history began with the Age of Five Rulers roughly five thousand years ago? Today, more than a fifth of the entire world’s population lives in China—that’s over 1.35 billion people! As a result, the...

This video highlights how geologists use fossils to study Earth's history and create a timeline.

Howcast - This subtle trick will lengthen your school report without your having to write a single extra word.

Howcast - Learn the differences between bipolar disorder 1, 2, and 3 and cyclothymic disorder from psychiatrist Ankur Saraiya in this Howcast video.

Howcast - Learn what the quiet period is and what's allowed during that time in this college football recruiting video from Howcast with coach Randy Taylor.

Howcast - Learn about Dr. Michelle Francis, one of Howcast's birth control experts, in this video.

Howcast - Learn how to stop your period with birth control in this Howcast video.

Howcast - Learn about the vaginal ring, aka the Nuva ring, in this Howcast video about birth control.

Howcast - Learn about the possible side effects of a birth control shot in this Howcast video.

Howcast - Learn about the possible side effects of an IUD in this Howcast video about birth control.

Howcast - Learn what Seasonale is in this Howcast video about birth control.

Howcast - Learn what schizoaffective disorder is from psychiatrist Jeanie Tse in this Howcast video.

Howcast -Learn what palm reading, also known as palmistry, can do for you from psychotherapist and palm reading expert Ellen Goldberg, M.A. in this Howcast video.

In this video, we delve into the concepts of payback and accounting rate of return, two important metrics used in evaluating investment projects. The teacher explains the non-discounted and discounted models of payback, highlighting the...

Budgeting or setting a budget is the process of allocating resources to future or intended activities. There many types of budget and manners of involvement in the budgeting process.

This video provides an overview of the discounting model of net present value and explains how to calculate the present value of future cash flows using the discount factor.

This video provides a fascinating overview of dinosaurs, their reign on Earth for 165 million years, their diverse sizes and species, and their eventual extinction due to a combination of a meteorite impact and volcanic eruptions. It...

In this video, the teacher discusses the concept of ice ages and explains that there have been five major ice ages in Earth's history. The current period is an interglacial period within the Quaternary Ice Age, which started 2.6 million...

When you are planning your project, you need to be mindful of all sorts of things. Some, you can control. Others are external, and you cannot. So, what are External Dependencies in your Project?

Iranian Shahs Family Tree | Safavid, Qajar & Pahlavi Dynasties