Topic: oxygen

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It’s Okay to Be Smart – The Cycle: Carbon and Oxygen and You

From PBS Digital Studios and Joe Hanson of It's Okay to Be Smart, this is The Cycle: Carbon and Oxygen and You, a visualized explanation for what happens when we breathe. And here it is explained: via It's Oka...

The Fire Lab and the Mysterious Science of Fire

How does fire spread? How do different forest materials fuel it? How can firefighters better understand its behavior in order to control it? Why is the physics of fire so counter-intuitive and mysterious to us? At Th...

Baltimore’s Trash-Collecting Water Wheel

River cleanup in Baltimore has gotten easier (and more fun to watch) with the construction of the Healthy Harbor initiative's Water Wheel. Designed by John Kellett and Daniel Chase, the solar and water-powered trash c...

Match burning in slow motion

What’s happening when a match is lit? From Answers.com:  Matches contain sulfur, glass powder, and an oxidizing agent as the components in the match head. When you strike a match, the ...

How can we know anything about distant exoplanets?

How can we know the size, composition, and atmospheric makeup of distant exoplanets? NASA explains the details in this Alien Atmospheres video.  By observing periodic variations in the pare...

Subo Kayak Submarine

This unusual underwater journey in South Africa involves kayaking legend, French expat, and mad inventor Olivier Feuillette, and a modified kayak. With a waterproof top, a ballast (so that it will sink), scuba tanks ...

Make an underwater vortex ring generator

Watch YouTube user Xraise Cornell create a homemade horizontal vortex ring generator. When a small burst of air is released into a toroidal or poloidal vortex — essentially a spinning donut of water — it s...

A diver makes underwater vortex rings that can knock over rocks

And here I thought this was just an animated gif, but no, via Daily Picks & Flicks, there’s a video of a diver making a bubble ring or vortex ring, above. A vortex ring is the phenomenon where a quantity...

Periodic Table of Videos: Liquid Oxygen (slow motion)

From the Periodic Table of Videos team, hot charcoal meets Liquid Oxygen (slow motion). via Doobybrain.

Why Red Blood Cells Look Like Donuts

This week, the 5 year old discovered the science videos of Bite Sci-zed’s Alex Dainis, starting with this one: Echinoderm Show & Tell. When he immediately asked for more, we watched The Gas Laws, Dishes and...

Science on the SPOT: Preserving the Forest of the Sea

In this Science on the SPOT: Preserving the Forest of the Sea, watch Kathy Ann Miller, PhD, curator of the University Herbarium at the University of California - Berkeley, as she shares the wide variety of seaweeds ...

Ice Cores: Measuring Earth’s atmosphere from 20,000 years ago

When you drill 364 meters (1194 feet) down into Antarctic ice, taking out a cylindrical section called an ice core, you can find out about the Earth’s temperature and carbon dioxide levels from over 20,000 yea...

The circulatory system

The circulatory system consisting of the heart, arteries, capillaries, and veins, is the pumping mechanism that transports blood throughout the body. In the heart, the left ventricle contra...

Alien Matter in the Solar System

“Alien matter" detected by a NASA spacecraft orbiting Earth shows that the chemical make-up of our solar system differs from that of the surrounding galaxy. 

The last five, wonder-filled minutes of Extreme Stars

You’re made of carbon, you’re made of oxygen, there’s iron in your blood. All of those things had to be generated inside the core of a star. There’s no other way to get them. So when you ...