Many species show off their teeth as a threat, so where did humans get our friendly smiles?

This video is an introduction to the concept of perfect competition in economics. The speaker explains the four main assumptions of perfect competition, including many buyers and sellers, perfect information, homogeneous products, and no...

This video is a lesson on the market structure of perfect competition. The instructor explains the characteristics, efficiency results, and limitations of perfect competition. The instructor also discusses how firms may not invest much...

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which...

Learn how to graph a parabola in when it is given in general form. To graph a parabola in conic sections we will need to convert the equation from general form to standard form by completing the square. Once it is in standard form we can...

In this video, we explore the structure and function of the extrinsic toe extensors in the anterior leg compartment: extensor digitorum longus (EDL) & extensor hallucis longus (EHL). More specifically, we will learn the origins,...

👉 Learn about integration. The integral, also called antiderivative, of a function, is the reverse process of differentiation. Integral of a function can be evaluated as an indefinite integral or as a definite integral. A definite...

WARNING: THIS VIDEO HAS SCENES WITH FLASHING LIGHTS. The tiny BioBots engineered at one NSF-funded Science and Technology Center (STC) move a bit like inchworms, but they represent giant strides in science and engineering. They can be...

An artwork's color or composition can pull you in -- and put you on the path to having important and difficult conversations, says artist Titus Kaphar. In this stunning talk, he reflects on his artistic evolution and takes us on a tour...

This Week in Global Health covers everything you wanted to know about MERS-CoV and the MERS outbreak. We do the digging and answer your questions; What is MERS? Where is the MERS outbreak happening? How is the MERS-CoV transmitted and...

Custard's Last Stand | Part 1 | STORY | NASTY<br/>
Michael Rosen keeps bumping into a chatty old lady who tells him wildly unlikely stories - like there being man eating fleas on the Lo<br/>ndon tube.

Learn to use the most powerful feature of Google Classroom: assigning a Google file with the "make a copy for each student" option queued up as a draft so that you can easily post it when you're ready.

Hey dancers! This is a contemporary dance routine that you can learn and put to any song. The choreography includes basic contemporary dance moves, floor work, flexibility tricks, and more.

My 60 second explanation of how to draw a perfect competitive firm making a profit. This is a great way to see if you really understand the graphs. Identify which one of the four graphs is drawn correctly. Be sure to identify what is...

Learn how to write the equation of an ellipse from its properties. The equation of an ellipse comprises of three major properties of the ellipse: the major radius (a), the minor radius (b) and the center (h, k). The ellipse is vertical...

Beauty is about more than the body you inhabit -- it's a way of being that goes beyond genetics or societal ideals. Aboriginal writer and former model Sasha Sarago invites you to decolonize beauty, moving away from the monolithic...

MOT 1920s: AUTO INDUSTRY: VS Ads for automobiles, cars including Essex convertible, Chrysler sedan, Chevrolet, two illustrations of upscale car models: convertible &a two door sedan priced at $995.00.

This video explains the concept of competitive markets and how barriers to entry affect the competitiveness of a market. It discusses the characteristics of a competitive market and the main market structures, including perfect...

Standing in the Roman senate, Octavian read out the shocking details of Mark Antony's will. It was a devastating revelation that immediately gave the young schemer a major advantage over his soon-to-be disgraced rival. From the Series:...

This nugget explains about the different types of forces.

Mr. Clifford's 60 second explanation of how to draw a perfectly competitive labor market and firm hiring workers. Notice that the perfectly elastic (horizontal) curve is now supply.

Basilica of Santa Maria Maggiore, Rome, 5th century A.D. A Smarthistory video with partner Context Travel. Speakers: Dr. Steven Zucker and Richard Bowen. Created by Beth Harris and Steven Zucker

In this video I explain how to draw a firm in monopolistic competition. Notice, the firm will make zero economic profit in the long run since there are low barriers to entry. Make sure you know how the graph changes from the short run to...

This nugget shows how to multiply three-digit numbers by two-digit numbers.