X is everywhere and it’s probably thanks to math. But why is x the symbol for the unknown?

Physician-scientist Anna Greka investigates the world's rarest genetic diseases, decoding the secrets of our cells through "molecular detective work." She explains how her team is using new, advanced technology to solve decades-old...

Renowned African-American writers Henry Louis Gates Jr. and Evelyn Brooks Higginbotham discuss their joint project, 'The African-American National Biography'.

In 2009, researchers ran a simple experiment. They took everything we know about our solar system and calculated where every planet would be up to 5 billion years in the future. They ran over 2,000 simulations, and the astonishing...

The story of the word X-Ray is one of great thinkers. French philosopher Rene Descartes isolated the letters X, Y and Z to stand for unknowns, and centuries later, Wilhelm Rontgen discovered the X-ray, using the X for the unknown nature...

Some paleontologists wonder how many species of dinosaurs are left for us to discover, and how many fossils of them are out there. Find out how long the experts think the world's supply of dinosaur fossils will last!

In this video Paul Andersen shows conceptual thinking in a mini-lesson on testing causes.

T
ERMS:
Tests - a planned act that is done to learn
something
Cause - a thing that gives r
ise to an event
Support - t
o give...

Nature is wonderfully abundant, diverse and mysterious -- but biological research today tends to focus on only seven species, including rats, chickens, fruit flies and us. We're studying an astonishingly narrow sliver of life, says...

From the very large to the very small, the universe is an amazing place. Here's my favorite ways to explore its scale.

Why is 'x' the symbol for an unknown? In this short and funny talk, Terry Moore gives the surprising answer.

Gill Hicks's story is one of compassion and humanity, emerging from the ashes of chaos and hate. A survivor of the London terrorist bombings on July 7, 2005, she shares her story of the events of that day -- and the profound lessons that...

Today, one of the biggest paradoxes in the universe threatens to unravel modern science: the black hole information paradox. Every object in the universe is composed of particles with unique quantum properties and even if an object is...

Most of us experience specific fears at one point or another, like of death or the future, but psychologists believe there might be one underlying fear from which all others originate.

A video entitled "Pythagorean Theorem in Solids" which talks about how 2D right triangles can be found in many 3D figures.

A video entitled "Percent Problems" which shows how to use a proportion to solve percent problems.

You will calculate missing side lengths in volume problems.

The video explores how our fear of the unknown often leads us to make decisions based on short-term comfort rather than weighing long-term risks and rewards. It delves into the impact of fear on our choices, from everyday decisions like...

What is Dark Matter? -- What if I told you that there may be trillions of particles going through your body right now, and you can’t see it, hear it, or touch it.



And that...

Howcast -Check out Part 2 and beat "Mind the Gap" from Call of Duty Modern Warfare 3 with this online demo of the action packed FPS from Infinity Ward.

Pupil outcome: I can use language and structure to create contrast between the familiar and the unknown. Key learning points: - You can use language such as semantic fields to show the contrast between the familiar and the unknown. - You...

Pupil outcome: I can understand and analyse the way different settings are presented. Key learning points: - Baum describes the everyday setting of Kansas as dull and predictable. - Baum describes the unknown setting of Oz as wondrous...

Pupil outcome: I can use equivalence and compensation strategies to solve addition problems in a range of contexts. Key learning points: - The part-whole structure can be used to represent additive problems in a range of contexts. - A...

Pupil outcome: I can use the same difference rule to balance equations. Key learning points: - If I add __ to the minuend and add the same number to the subtrahend, the difference stays the same. - If I subtract __ from the minuend and...

Pupil outcome: I can use my knowledge of addition and subtraction within 10 when solving problems. Key learning points: - Part + part = whole - Whole − known part = unknown part