In this video Paul Andersen explains how the average value of the electric field can be determined by dividing the potential difference by the displacement. Equipotential lines can be used to determine the potential in an electric field...

Join the Amoeba Sisters as they explain gene and chromosome mutations, and explore the significance of these changes. This updated video has improved audio and images! Codons and the amino acids they code for is represented by standard...

You can find out how to fairly divide rent between three different people even when you don't know the third person's preferences! Find out how with Sperner's Lemma.

In a hilarious, completely improvised talk, improv master Anthony Veneziale takes to the TED stage for a truly one-of-a-kind performance. Armed with an audience-suggested topic ("stumbling towards intimacy") and a deck of slides he's...

Antler cells divide really fast, and with their super-fast growth, antlers resemble tumors in some ways. But animals in the deer family are less likely to get cancer than many other organisms, and a recent genetics study may have...

We tend to think of blindness as something you're born with, but with certain genetic diseases, it can actually develop when you're a kid, or even when you're an adult. But could blind eyes possibly regenerate? David Davila explains how...

Because of the way genetic reprogramming works, it’s hard to make one clone based on an adult cell, and it’s almost impossible to make a second-generation one.

Explore the cell cycle with the Amoeba Sisters and an important example of when it is not controlled: cancer. Table of Contents: 00:00 Intro 1:00 Cell Growth and Cell Reproduction 1:42 Cancer (explaining uncontrolled cell growth) 3:27...

In this video Paul Andersen explains the importance of standard deviation. He starts with a discussion of normal distribution and how the standard deviation measures the average distance from the mean, or the "spread" of data. He then...

You’re on the trail of a werewolf that’s been terrorizing your town. After months of detective work, you’ve narrowed your suspects to one of five people. You’ve invited them to dinner with a simple plan: to slip a square of a rare...

Even cells can be selfish.

Updated Mitosis Video. The Amoeba Sisters walk you through the reason for mitosis with mnemonics for prophase, metaphase, anaphase, and telophase. Table of Contents: 00:00 Intro 0:44 Why is Mitosis Important? 2:00 Why Don't You Want...

In this video Paul Andersen defines impulse as the product of the force applied and the time over which the force is applied. The impulse of an object is equivalent to the change in momentum of the object. Several problems related to...

Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence.

The Presocratics: Crash Course History of Science #2

There are genetic mutations in the population today that can grant people some seemingly superhuman abilities.

In this video Paul Andersen explains the importance of mitosis and details the major steps in the cell cycle. He explains the importance of Interphase, Prophase, Prometaphase, Metaphase, Anaphase, Telophases, and Cytokinesis.

In this video Paul Andersen answers the very simple question: What is cancer? He explains how damage to the DNA can create uncontrolled cell growth. He explains how malignant tumors can spread the disease throughout the body and gives...

Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world's most commonly used form of encryption.

Imagine setting sail from Hawaii in a canoe. Your target is a small island thousands of kilometers away in the middle of the Pacific Ocean - a body of water that covers more than 160 million square kilometers. For thousands of years,...

New ReviewIn this Grade 7 math video, students will learn how to extend a number pattern using a given rule with repeated division to find the sixth term. This step-by-step video models how to apply the rule correctly and use long division to...

New ReviewIn this short math lesson, we’ll solve a quadratic equation step-by-step using completing the square. We follow 6 quick steps: 1️⃣ If necessary, “move” c to the right side of the equation. 2️⃣ If necessary, divide all terms by a. 3️⃣...

New ReviewIn this video I am going. ork through how to multiply and divide a fraction by an integer fast

New ReviewIn this video I am going to cover a key principal of dividing fractions that can make your life a lot easier.