What Do ‘Natural’ and ‘Artificial’ Flavors Really Mean?

What does it actually mean when your snack cake has “naturally” or “Artificially” flavored on the package? Find out in this episode of SciShow! [SciShow]

Ever Noticed? Bandaids Glow When Opening!

Have you ever noticed, Bandaids and tape glow an eerie blue when you peel them open! What is going on?! Find out the strange science with Dianna Cowern aka Physics Girl. [Physics Girl]

We Might Be Totally Wrong About Alzheimer’s

Scientists found that the prevailing hypothesis of how the Alzheimer’s disease starts might be wrong, and some viruses could be the culprit. [Scishow]

A Look at How Your Hormones Work [Science Video]

Over our lifetimes, our bodies undergo a series of extraordinary metamorphoses: we grow, experience puberty, and many of us reproduce. Behind the scenes, the endocrine system works constantly to orchestrate these changes. Emma Bryce explains how this system regulates everything from your sleep to the rhythm of your beating heart, exerting its influence over each […]

What Causes Hallucinations? [Science Video]

A condition called Charles Bonnet Syndrome can cause blind patients to hallucinate scenes in vivid color. fMRI studies show that these hallucinations activate the same brain area as sight — which is a completely different region from imagination. Other hallucinations also involve the same brain areas as real sensory experiences. What’s going on? Elizabeth Cox […]

How Can the Universe Be Flat?

Can geometry predict the future? Cosmologists think the overall curvature of universe can tell us secrets about how it will eventually end. Find out more in this episode of SciShow Space. [SciShow Space]

Why Do Coffee Naps Recharge You So Well? [Science Video]

With their powers combined, coffee and naps create a greater sum than their parts. Find out why in this episode of Scishow. [SciShow]

The psychology of post-traumatic stress disorder

Many of us will experience some kind of trauma during our lifetime. Sometimes, we escape with no long-term effects. But for millions of people, those experiences linger, causing symptoms like flashbacks, nightmares, and negative thoughts that interfere with everyday life. Joelle Rabow Maletis details the science behind post-traumatic stress disorder, or PTSD. [TED Ed]