How do scars form?

It’s hard to escape childhood without racking up a few scars. Why do these leftover reminders of a painful cut or crash look different from the rest of our skin? And why do they stick around for so long after the incident that caused them? Sarthak Sinha explains how scars form.

TED ED: Lesson by Sarthak Sinha, animation by Karrot Animation.

The Science of Skin

Between you and the rest of the world lies an interface that makes up 16% of your physical weight. This is your skin, the largest organ in your body: laid out flat, it would cover close to 1.7 square metres of ground. But besides keeping your organs in, what is its purpose? Emma Bryce takes us into the integumentary system to find out.

TED ED: Lesson by Emma Bryce, animation by Augenblick Studios.

https://www.patreon.com/teded

The Science of Skin Color

When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it’ll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the slightest change. What’s to account for that difference, and how did our skin come to take on so many different hues to begin with? Angela Koine Flynn describes the science of skin color.

TED ED: Lesson by Angela Koine Flynn, animation by TomΓ‘s Pichardo-Espaillat.

https://www.patreon.com/teded