Topic: science

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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...

Jane Goodall inspires kids at Berkeley’s Redwood Grove

For anyone who has admiration for trailblazing primatologist and conservationist Dr. Jane Goodall, these highlights of her October 13, 2015 appearance at Berkeley's University of California Botanical Garden will be a ...

G is for Ground – Circuit Playground

Join Adafruit Founder Limor Fried and her robot friend ADABOT as they find electrical connections to the earth in a wide variety of places. This is G is for Ground from Circuit Playground, Adafruit's kid-friendly educ...

Mimicking shark skin to combat superbugs – Think Like a Tree

In 2001, materials scientist Dr. Anthony Brennan observed that Galapagos Sharks are barnacle and algae-free due to the micro-topography of their skin. These diamond pattern nanoridges also make it difficult for bacter...

The Inverted Glass Harp

We love glass harps – instruments made from wine glasses that are filled with different amounts of water to create a series of desired pitches. In The Inverted Glass Harp, Dan Quinn shows us that empty glasses can als...

Think Like a Tree – Problem solving with nature’s best ideas

Biomimicry -- imitating nature's best ideas in our design of materials, structures, and systems -- can provide huge leaps in our understanding when it comes to solving challenges. Example: How do we keep our buildings...