Youtuber The Hacksmith recently built a real life retractable plasma lightsaber that can actually cut through metal, but he only released the demo video of it in action today. For those who are curious, the beam is made from a mix between liquid propane gas and oxygen, “mixed in a really fancy laminar flow gas […]
A simple video explaining how anesthesia works by the folks at TED Ed. Check it out! When under anesthesia, you can’t move, form memories, or — hopefully — feel pain. And while it might just seem like you are asleep for that time, you actually aren’t. What’s going on? Steven Zheng explains what we know […]
In the past 3,000 years, many populations have evolved genetic adaptations to their local environments. People in Siberia and the high arctic are uniquely adapted to survive extreme cold. The Bajau people can dive 70 meters and stay underwater for almost 15 minutes. So what are other recent changes? And will our technological innovations impact […]
Nostalgia was once considered an illness confined to specific groups of people. Today, people all over the world report experiencing and enjoying nostalgia. But how does nostalgia work? And is it healthy? Clay Routledge details the way our understanding of nostalgia has changed since the term was first coined in the late 17th century. Lesson […]
Spines are naturally curved, not straight, so what good posture actually looks like isn’t as straightforward as you might think. [SciShow]
What exactly is CRISPR Cas9? Where did it come from? How are scientists using it? And what are the ethical ramifications? Find out in this science-ified version of “7 Rings” by Ariana Grande, by 8th graders from The Nueva School. [Science With Tom]
Even though doctors have been using general anesthesia for nearly 200 years, they haven’t really understood the details of how it temporarily shuts down your brain — until now. [SciShow]
From Minute Physics: This video is about how masks (whether surgical, or N95, or cloth) are counterintuitive and actually work much better epidemiologically than one might expect. Masks do double-duty, and the fraction of interactions with masks is much higher than the fraction of people wearing masks, so partially adopted, partially effective masks are able […]
From Kurtis Baute: If you set up a row of dominoes as a timeline of history from the Big Bang to now, and had each domino represent 1 million years it would stretch over 300 meters long. I know because thats what I did for this video. The universe is very old. [Kurtis Baute | […]
In this video, “The Action Lab” takes a look at some strange shapes that, even though they should not roll, they actually do. He then proceeds in explaining the science and physics of what makes things roll. For those interested in purchasing these strange toys, Amazon has them right here. Please note that Geeks are […]