Topic: science

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How Far Do Sneezes and Vomit Travel? – Gross Science

Let's enter the world of sneeze experiments and vomiting machines with Anna Rothschild as she explains just how far the tiny liquid particles from sneezes and vomit can travel... and it's farther than you think. 'Vomi...

This Technology Wants to Make Wheelchairs Obsolete

What if people who are currently wheelchair-bound could, in the future, put on an exoskeleton -- a wearable bionic exosuit -- as if it was simply a shirt and jeans? Ekso Bionics, a design and manufacturing startup out...

Why do autumn leaves cause train delays? – Liz Bonnin

Why do 'leaves on the line' cause train delays, especially in autumn? The serious danger comes from a series of physics challenges: Leaves are sucked onto the tracks by the fast moving trains. The train wheels crush t...

Macro Video of Iridescent Soap Bubbles – Stereokroma

The next time you get the opportunity to blow some soap bubbles, be sure to take a long, close look at them. Those ever-changing rainbows sliding around across the surfaces of the bubbles can be spellbinding... like a...

Solar Wind Strips Martian Atmosphere – NASA Goddard

In 2014, NASA's MAVEN (Mars Atmosphere and Volatile Evolution mission) spacecraft measured the speed and direction of ions escaping from Mars. The data collected as it orbited the Red Planet is visualized in this NASA...

General relativity & why GPS wouldn’t work if we didn’t know about it

General relativity, what Albert Einstein said was the happiest thought of his life, basically expands upon the idea that "the laws of physics are the same everywhere". Light and gravity behave in the same way for you....

Lunar Eclipses Explained + Does The Moon Really Orbit The Earth?

"As bright as the moon looks in the night sky, what we're really seeing is sunlight, and the percent of its face that's illuminated depends on where it is in relation to the Earth. At the point in its orbit when the m...

Thin underwater cables hold the internet – Vox

Remember those 550,000 miles of undersea cables that power the internet? Learn more about this 150+ year old, cutting-edge fiber optic technology, from what the cable layers are made of, to how they're installed, to h...

Debunking the “I will never need to use this…” myth

If you've ever heard the phrase, "I will never need to use this ever again," regarding a theorem of mathematics, or a scientific law, or a fact from the history of a far corner of the planet, consider this from astrop...

Filming bats with slow motion & thermal cameras

Studying bats can be smelly and messy, but bat biologist Nickolay Hristov explains why he finds his job to be such an exhilarating endeavor. As he attends to high speed cameras at a cave mouth in South Central Texas, ...

Ferrofluid + Glow Sticks – The Physics Girl

Ferromagnetic + fluid = ferrofluid, a liquid containing nanoscale particles of magnetite, hematite, or an iron compound. Invented by NASA's Steve Papell in 1963, ferrofluid forms undulating spikes and patterns as it r...

Extreme Gs in a centrifuge – Simulating gravity on other planets

What is it like to feel gravity on Neptune or Jupiter, or to experience the G-forces that astronauts endure when they're returning to Earth in the Soyuz? In this clip from episode 3 of Wonders of the Universe, Pro...

Biisuke Ball’s Big Adventure – Pitagora Suitchi

Biisuke is a little red ball who must go on a big adventure to save his brothers Biita and Biigoro after they're imprisoned in the high tower of a Rube Goldberg Machine. "Here we go, Biisuke Ball, sneaking into the en...

The Rosetta Mission Asks, “How Did Our Solar System Form?”

How does studying Comet 67P/Churyumov–Gerasimenko start to shed light on some of the questions we have about the origins of the universe? For example, how did gas and dust form our solar system? How did we get from st...

The Real Reason Leaves Change Color In the Fall – MinuteEarth

Every autumn, green chlorophyll fades from the leaves of deciduous trees, revealing the underlying reds, oranges, and yellows. But why does the chlorophyll fade in the first place? Recycling! MinuteEarth explains. ...

Hot & Cold Water Science Experiment – HooplaKidzLab

With two matching jars, red and blue food coloring, some hot and cold water, an index card, and a dish or baking pan, you can observe how the different densities of hot and cold water behave. This experiment by Hoopla...

Paleoartist John Gurche reconstructs the face of Homo naledi

Paleoartist John Gurche is known for his award-winning reconstructions of our ancient human ancestors. His process of mixing forensic accuracy with emotional realism has been featured in documentaries by National Geog...

MorpHex MKIII, the glowing, transforming robot

Glowing with programmed LEDs, rolling around in "spheremode" with twelve synchronized shell sections, and walking as a hexapod robot, this is MorpHex MKIII, the transforming robot, made in 2014 by kinematics expert Kå...