Paul Andersen explains how populations experience exponential. He begins by address the major players; N (population size) and r (growth rate). He models population growth in rabbits through four generations. He then shows you how to...

In 4 minutes, atmospheric chemist Rachel Pike provides a glimpse of the massive scientific effort behind the bold headlines on climate change, with her team -- one of thousands who contributed -- taking a risky flight over the rainforest...

In this video Paul Andersen explains how the conservation of mass was replaced with the conservation of mass-energy when it was determined that they are equivalent. This famous equation not only show the mass-energy equivalence but can...

Immovable Object vs. Unstoppable Force - Which Wins

Antimatter Explained

Join Jessi and Squeaks to see how you can make your very own alien egg!

In this video Paul Andersen explains that the angular momentum of a system will be conserved as long as there is no net external torque. Both point objects and extended objects are covered along with several examples.

Phyllis Rodriguez and Aicha el-Wafi have a powerful friendship born of unthinkable loss. Rodriguez' son was killed in the World Trade Center attacks on September 11, 2001; el-Wafi's son Zacarias Moussaoui was convicted of a role in those...

In this video Paul Andersen shows conceptual thinking in a mini-lesson on the conservation of matter.


TERMS
Matter - physical
substances
Atoms - the basic un
it of elements
Conservation - the quantity of a...

Explore the Hardy-Weinberg Equilibrium equations with The Amoeba Sisters! Learn why this equation can be useful, its five assumptions, and how to calculate genotype and allele frequencies with p and q values! This video does assume the...

Ever wonder how Einstein proved E=mc2? This is how. Pi day (3.14) is Albert Einstein's Birthday! To celebrate, we'll explain 4 of his most groundbreaking papers from 1905, when he was just 26 years old

Negotiating thermostat settings can be really frustrating, but your officemate isn't trying to freeze you out on purpose. Stefan explains the science behind why people experience temperatures differently.

Fun fact: Stefan wears a...

Around the world, women still struggle for equality in basic matters like access to education, equal pay and the right to vote. But how to enlist everyone, men and women, as allies for change? Meet Elizabeth Nyamayaro, head of UN Women's...

In this video Paul Andersen explains how electric force on an object inside a field can be calculated by multiplying the charge of the object (in C) times the electric field strength (in N/C).

A quick explanation of e^(pi i) in terms of motion and differential equations

In a very, very early-morning set, They Might Be Giants rock TED2007, playing "Older," "Bee of the Bird of the Moth," "Asbury Park," "Fingertips," and "The Alphabet of Nations." Plus they take phone calls from the dead.

Mr. Andersen shows you how to draw free body diagrams of various objects. The major forces (like gravity, normal, tension, friction, air resistance, etc.) are discussed and then applied to various problems.

In this video Paul Andersen explains how you can use Coulomb's Law to determine the electric force between two charges. In Physics 1 students should be able to calculate the force between two charges and in Physics 2 students should be...

In this video Paul Andersen explains how linear momentum is conserved in all collisions. In completely elastic collisions the kinetic energy of the objects is also maintained. Several examples and demonstrations are included.

In the fall of 2011 Peter Norvig taught a class with Sebastian Thrun on artificial intelligence at Stanford attended by 175 students in situ -- and over 100,000 via an interactive webcast. He shares what he learned about teaching to a...

Is the equinox really when day = night, or is that a myth?

If you can't afford an attorney, one will be appointed for you, right? Not in US civil court. From high legal fees to confusing paperwork and expensive lawyers, it can be difficult to settle civil matters. Entrepreneur and TED Fellow...

Writer and designer Graham Hill asks: Can having less stuff, in less room, lead to more happiness? He makes the case for taking up less space, and lays out three rules for editing your life.

People ask Google everything under the sun. One of the most commonly searched questions in the world is “How Many Calories Should I have in a day?” Allow us at SciShow to explain.