SciShow
DNA Structure and Replication: Crash Course Biology
Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells.
SciShow
How One Disease Changed What We Know About Medicine - Twice
Searching for a cure for rickets led to the discovery of vitamin D. Fortifying foods with vitamin D led to another disease, and a whole new way to view genetic disease in general.
TED-Ed
TED-Ed: Can you outsmart Fate and break her ancient curse? | Dan Finkel
Hundreds of years ago, your ancestor stole a magical tarot deck from Fate herself— and it came with a terrible cost. Once every 23 years, one member of your family must face Fate in a duel with rules only known to your opponent. And...
Bozeman Science
Unit 5 Review - Genetics
Paul Andersen reviews the major concepts within the fifth unit of the new AP Biology framework. He starts with a description of both DNA and RNA. He explains how DNA is copied during the S phase of mitosis. He explains how transcription...
PBS
The Mathematics of Diffie-Hellman Key Exchange
Symmetric keys are essential to encrypting messages. How can two people share the same key without someone else getting a hold of it? Upfront asymmetric encryption is one way, but another is Diffie-Hellman key exchange.
3Blue1Brown
Pi hiding in prime regularities
A beutiful derivation of a formula for pi. At first, 1-1/3+1/5-1/7+1/9-.... seems unrelated to circles, but in fact there is a circle hiding here, as well as some interesting facts about prime numbers in the context of complex numbers.
PBS
Are Prime Numbers Made Up?
Is math real or simply something made up by mathematicians? You can't physically touch a number yet using numbers we're able to build skyscrapers and launch rockets into space. Mathematician Kelsey Houston-Edwards explains this...
TED-Ed
TED-Ed: Can you solve the fortress riddle? | Henri Picciotto
Bad news: your worst enemies are at the gate. Your fledgling kingdom guards the world's only herd of tiny dino creatures. To you, they're sacred. To everyone else, they're food. The three closest nation-states have teamed up to smash...
TED-Ed
TED-Ed: Can you solve the rogue submarine riddle? Difficulty level: Master | Alex Rosenthal
Smuggling yourself aboard the rogue submarine was the easy part. Hacking into the nuclear missile launch override — a little harder. And you've got a problem: you don't have the override code. You know you need the same numbers that were...
3Blue1Brown
Why do prime numbers make these spirals?
A curious pattern in polar plots with prime numbers, together with discussion of Dirichlet's theorem
TED-Ed
TED-Ed: Can you solve the feeding frenzy riddle? | Henri Picciotto
As Numberland's best detective, you thought you'd seen it all. But the desiccated corpses of prominent natural numbers have been showing up all over the city. A lockdown is ordered from sundown to sunrise, and it's still not enough to...
SciShow Kids
Make Your Own Well! Science Project for Kids
Jessi and Squeaks have talked about how wells move water from one place to another before; now they're going to show you how to build your very own so you can see for yourself!
TED Talks
TED: Why I fell in love with monster prime numbers | Adam Spencer
They're millions of digits long, and it takes an army of mathematicians and machines to hunt them down -- what's not to love about monster primes? Adam Spencer, comedian and lifelong math geek, shares his passion for these odd numbers,...
Crash Course
DNA, Hot Pockets, & The Longest Word Ever: Crash Course Biology
Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins.
Crash Course
DNA Structure and Replication: Crash Course Biology
Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells.
PBS
How to Break Cryptography
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.
Curated Video
Practical Examples
A video entitled "Practical Examples" that covers transformations the result in similar figures, such as dilations and translations.
Curated Video
How to Gesso a Canvas
Howcast - You can’t expect to paint a masterpiece on untreated cloth. Here’s how to gesso, or prime, a homemade canvas in a hurry.
Curated Video
How to Prepare Your Canvas for Acrylic Painting
Howcast - Learn how to prepare your canvas to paint with acrylic paint from painter Linda Rhea in this Howcast video.
Curated Video
How to Paint with Acrylic on Hardboard or Wood
Howcast - Learn how to paint with acrylic paint on hardboard or wood from painter Linda Rhea in this Howcast video.
Curated Video
Prime Lenses vs. Zoom Lenses for Digital Cameras
Howcast - Learn about digital camera prime lenses versus zoom lenses from commercial photographer Dan Bracaglia in this photography lesson from Howcast.
Curated Video
How to Prevent Lipstick from Fading & Feathering
Howcast - Learn how to prevent lipstick from fading and feathering in this makeup tutorial from Howcast.
Curated Video
Is Primer Necessary before Painting?
Howcast - Learn if you need to apply a coat of primer before painting from Brushed Interiors founder David Sartori in this Howcast video.
Curated Video
How to Prime Walls for Painting
Howcast - If it's time to redecorate, a little extra time priming your walls can help you paint like a pro.