Did you know that your environment and lived experiences can actually affect your DNA? Welcome to the world of epigenetics! In this fun episode of SciShow, Hank & his clone Circus Hank explain the power of epigenetics, which studies the...

People have been getting tattoos for thousands of years, but we've never quite been sure why the ink sticks around under our skin. A group of researchers now think they might have the answer. Plus, scientists are on the road to making...

If you have a tattoo, you're part of a rich cultural history that dates back at least 8,000 years. Where did this practice of body modification come from, and how has its function changed over time? Addison Anderson tracks the history of...

After a friend of mine got a tattoo with a representation of the cosecant function, it got me thinking about how there's another sense in which this function is a tattoo on math, so to speak.

People have been getting tattoos for thousands of years, but we've never quite been sure why the ink sticks around under our skin. A group of researchers now think they might have the answer. Plus, scientists are on the road to making...

If you’ve ever had a tattoo, you know that putting them on is pretty easy: just press on them with a wet towel for 30 seconds and they stick right on! But there’s a whole lot of science going on in that 30 seconds!

Prosthetics can't replicate the look and feel of lost limbs but they can carry a lot of personality. Designer Scott Summit shows 3D-printed, individually designed prosthetic legs that are unabashedly artificial and completely personal --...

Tattoos can transform and empower people, with some seeking them out to reconnect with their bodies due to scarring, physical abnormalities or the aftermath of a procedure or illness. Paramedical tattooist Becky Barker shares the art and...

Can we make tattoos both beautiful and functional? Nanotechnologist Carson Bruns shares his work creating high-tech tattoos that react to their environment -- like color-changing ink that can tell you when you're getting a sunburn -- and...

In this short talk, psychologist Dan Ariely tells two personal stories that explore scientific conflict of interest: How the pursuit of knowledge and insight can be affected, consciously or not, by shortsighted personal goals. When we're...

The earliest recorded tattoo was found on a Peruvian mummy in 6,000 BC. That's some old ink! And considering humans lose roughly 40,000 skin cells per hour, how do these markings last? Claudia Aguirre details the different methods,...

Why are tattoos permanent? How do you deliver the ink? And how do you remove a tattoo if you no longer want it?

After a friend of mine got a tattoo with a representation of the cosecant function, it got me thinking about how there's another sense in which this function is a tattoo on math, so to speak.

Anatomy & Physiology continues with a look at your biggest organ - your skin. -- Table of Contents: All About Skin 0:22 Epidermis, Dermis, & Hypodermis 1:30 Melanin And Keratin Cells 2:15 Ensure You Get A Good Tattoo 8:01

Howcast - A tattoo is forever – unless, of course, you want to go through the pain and expense of removing it. So think long and hard before you get one!

Howcast - You can either stumble into a shop one night after you’ve been drinking, or you can select a tattoo artist carefully. Which do you think is smartest?

Howcast - Learn how to get a tattoo you won't regret from the experts at Area 51 in this Howcast tattoo video.

Howcast - Learn how to pick a tattoo font from the experts at Area 51 tattoo studio in this Howcast tattoo video.

Howcast - Learn how to keep tattoos unique and personal from the experts at Area 51 tattoo studio in this Howcast tattoo video.

Howcast - Learn the most common mistakes people make when they get their first tattoo from the experts at Area 51 tattoo studio in this Howcast tattoo video.

Howcast - Learn about Area 51 Tattoo, one of Howcast's tattoo experts, in this video.

Howcast - Learn what to do the day before getting a tattoo to prepare yourself from the experts at Area 51 tattoo studio in this Howcast tattoo video.

Howcast - Let professional makeup artist Patricia Longo teach you how to cover up a tattoo with makeup in this Howcast video.

Howcast - Learn how to get inspiration for unusual tattoo ideas and designs from the experts at Area 51 tattoo studio in this Howcast tattoo video.