If we want to see more clearly in the dark, we shine a light - but we aren't the only species that does that. Some fish use active photolocation to shine their own light in the deep sea!

Sleep Apnea Signs & Symptoms (& Why They Occur) | Central, Obstructive & Mixed Sleep Apnea Sleep apnea is a term for several conditions involving decreased airflow during sleep. There are 3 main types of sleep apnea including central...

What are major scales? How do we build them? Why should you never use E# Major? Is there a Formula for Major Scales? All this and more today on Two Minute Music Theory! Season 3, Episode 3

Our lives depend on curbing climate change, but so many priorities seem to be in competition. What's the most urgent thing humanity can do right now? Social entrepreneur James Irungu Mwangi tells us why Africa could be the ideal home for...

This video explains how, by default, merging without approvals is allowed.
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This clip is from the chapter "Pull Requests" of the series "Complete Git Guide: Understand and Master Git and GitHub".This section explains how to...

We've all heard of mono. It's the kissing disease! But this term is a little minimizing and outdated. The disease is caused by the Epstein-Barr virus, and there are lot more details regarding transmission and disease than can be...

Learn all about skips in music notation to make it easier to read music.

Why are the coastal wolves of Vancouver Island so elusive? ➡ Subscribehttp://bit.ly/NatGeoSubscribe' target='_blank' rel='nofollow'>Subscribe About National Geographic: National Geographic is the world's premium destination for...

The Inaugural Conference @ King's, Institute for New Economic Thinking, Session 2: Has the Efficient Market Hypothesis Led to the Crisis? Collapsed with The Crisis?

👉 Learn how to evaluate inverse trigonometric functions. The inverse trigonometric functions are used to obtain theta, the angle which yielded the trigonometric function value. It is usually helpful to use the calculator to calculate the...

Harrybo's Grandad - Michael Rosen from The Hypnotiser<br/>

The United States 2020 Presidential election has been called by pretty much every organization that covers the event in any capacity and while the final decision is not made until the special club that is the electoral college has...

The tenth episode in a very long series about the American presidential elections from 1788 to the present. I hope to have them done by Election Day 2016. In 1824, it's a four-way race that does not have a majority winner in the...

Serialism and Serial Music explained, with an insight into serialism composition rules and techniques. Always wanted to understand Serialism or Twelve note tone rows? All evolved by the composers of the Second Viennese School, led by...

In this lesson, students learn how to evaluate higher powers of the imaginary unit, I, by recognizing patterns. They review the product rule, quotient rule, and power of 0 rule to simplify expressions.

Science can help solve the world’s most important problems, and what could be more important than keeping pee off your shoes? Yes, even the lowly urinal—and those who use it—can benefit from the occasional peer-reviewed study. So let’s...

Today we look at the quality of intervals. How can we determine the interval? Is it a major, minor, or perfect?

Are you a Situational Leader? Let's look at 4 Scenarios and examples to see how situational leaders adapt their approach to lead followers. This model is based on Hersey and Blanchard's situational leadership theory.

Why was the Mississippi river commission created? How did the commission go about creating this map?<br/>
Maps That Made America, Part 4

This video focuses on CSS font sizes.
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This clip is from the chapter "Common Cascading Style Sheets (CSS) Questions and Answers for Interview Preparation" of the series "Modern Web Design with HTML5, CSS3, and JavaScript".This...

The next step from triads is looking at sevenths chords and how to identify them in music.

In this video, the teacher explains how to pronounce multi-syllable words by understanding the concept of open and closed syllables. The lesson covers the pronunciation of long vowel sounds and short vowel sounds, providing examples and...

This video is about application integration services: Amazon Simple Notification Service (Amazon SNS). This clip is from the chapter "Application Integration Services" of the series "AWS Certified Cloud Practitioner (CLF-C01) [Updated...

👉 Learn the basics to graphing sine and cosine functions. The sine graph is a sinusiodal graph with x-intercepts at x = 2n*pi, maximun value of 1 at x = pi/2 + 2n*pi and minimum value of -1 at x = -pi/2 + 2n*pi. The cosine graph is a...