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Sæsoner 2019
Udgivelsesdato
Jan 11, 2019
A pulsing black hole in the centre of a distant galaxy sheds light on black hole and galaxy formation. How fast are black holes rotating and how does that rotation change over its life-span?
A pulsing black hole in the centre of a distant galaxy sheds light on black hole and galaxy formation. How fast are black holes rotating and how does that rotation change over its life-span?
Udgivelsesdato
Jan 25, 2019
Droplets levitate on a bath of liquid nitrogen and are spontaneously self-propelled.
Droplets levitate on a bath of liquid nitrogen and are spontaneously self-propelled.
Udgivelsesdato
Feb 06, 2019
Do negative air ions improve mood, anxiety, depression, alertness?
Do negative air ions improve mood, anxiety, depression, alertness?
Udgivelsesdato
Feb 18, 2019
A bisected grape in the microwave makes plasma. But how does it work? A grape is the right size and refractive index to trap microwaves inside it. When you place two (or two halves)
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A bisected grape in the microwave makes plasma. But how does it work? A grape is the right size and refractive index to trap microwaves inside it. When you place two (or two halves) close together the fields interact with each other creating a maximum of electromagnetic energy where they touch. This creates heating, sparks, and plasma, which is further fed with energy directly by the microwaves.
Udgivelsesdato
Mar 01, 2019
Is it possible to reconstruct sound from high-speed video images?
Is it possible to reconstruct sound from high-speed video images?
Udgivelsesdato
Mar 12, 2019
Compliant mechanisms have lots of advantages over traditional devices. SimpliSafe is awesome security. It's really effective, easy to use, and the price is great.
Compliant mechanisms have lots of advantages over traditional devices. SimpliSafe is awesome security. It's really effective, easy to use, and the price is great.
Udgivelsesdato
Mar 18, 2019
Research has found human brains can pick up on rotations of geomagnetic-strength fields as evidenced by drops in alpha wave power following stimulus.
Research has found human brains can pick up on rotations of geomagnetic-strength fields as evidenced by drops in alpha wave power following stimulus.
Udgivelsesdato
Mar 29, 2019
I always wanted to know why film looked better than video. Moving electronic images have as long a history but were invented for a different purpose.
I always wanted to know why film looked better than video. Moving electronic images have as long a history but were invented for a different purpose.
Udgivelsesdato
Apr 09, 2019
We are about to see the first image of a black hole, the supermassive black hole Sagittarius A* at the center of the Milky Way galaxy. But what is that image really showing us?
We are about to see the first image of a black hole, the supermassive black hole Sagittarius A* at the center of the Milky Way galaxy. But what is that image really showing us?
Udgivelsesdato
Apr 10, 2019
The Event Horizon Telescope Collaboration observed the supermassive black holes at the center of M87 and our Milky Way galaxy (SgrA*) finding the dark central shadow in accordance with
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The Event Horizon Telescope Collaboration observed the supermassive black holes at the center of M87 and our Milky Way galaxy (SgrA*) finding the dark central shadow in accordance with General Relativity, further demonstrating the power of this 100 year-old theory.
Udgivelsesdato
Apr 19, 2019
The story of three impressive high school science projects. Can you guess which student won $250,000 in the #RegeneronSTS?
The story of three impressive high school science projects. Can you guess which student won $250,000 in the #RegeneronSTS?
Udgivelsesdato
Apr 25, 2019
Tiny robots activated by magnetic fields may be used in future biomedical procedures.
Tiny robots activated by magnetic fields may be used in future biomedical procedures.
Udgivelsesdato
Maj 10, 2019
I took a boat through 96 million black plastic balls on the Los Angeles reservoir to find out why they're there. The first time I heard about shade balls the claim was they reduce
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I took a boat through 96 million black plastic balls on the Los Angeles reservoir to find out why they're there. The first time I heard about shade balls the claim was they reduce evaporation. But it turns out this isn't the reason they were introduced.
Udgivelsesdato
Maj 19, 2019
My hypothesis is that the algorithm, rather than viewer preference, drives views on the site. As the algorithm shifts, various YouTubers experience burnout (as what used to work no
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My hypothesis is that the algorithm, rather than viewer preference, drives views on the site. As the algorithm shifts, various YouTubers experience burnout (as what used to work no longer works) and right now click-through rate is the key metric. So clickable titles and thumbnails are the only way to get a lot of impressions and hence views - they are the only way to go viral. This leads me to wonder which audiences will become most prevalent on the site and if there will even be a place for educational content. In the long-term, hopefully YouTube is able to measure satisfaction through surveys and other metrics to ensure an optimal experience for everyone on the site.
Udgivelsesdato
Maj 31, 2019
Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return
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Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission. The focus of this video is silica aerogels, though graphene aerogels are now technically the lightest.
Udgivelsesdato
Jun 13, 2019
I bought 10,000 shade balls and tried to swim in them. They appear to act like a non-Newtonian fluid: rigid under high shear stress, but they flow like a liquid under low shear.
I bought 10,000 shade balls and tried to swim in them. They appear to act like a non-Newtonian fluid: rigid under high shear stress, but they flow like a liquid under low shear.
Udgivelsesdato
Jun 21, 2019
Aerogel has extraordinary properties but it can be tough to work with. This video looks at modifying aerogels to take advantage of their unique characteristics.
Aerogel has extraordinary properties but it can be tough to work with. This video looks at modifying aerogels to take advantage of their unique characteristics.
Udgivelsesdato
Jul 07, 2019
The Vikings suffered many hardships living in the north of Europe: long, cold winters and importantly a lack of sunlight. Luckily, they had cod.
The Vikings suffered many hardships living in the north of Europe: long, cold winters and importantly a lack of sunlight. Luckily, they had cod.
Udgivelsesdato
Jul 19, 2019
Apollo astronauts trained in nuclear bomb craters at the Nevada National Security Site. But why?
Apollo astronauts trained in nuclear bomb craters at the Nevada National Security Site. But why?
Udgivelsesdato
Aug 02, 2019
Electric cars are now ready to take over thanks to advances in battery technology and their inherent benefits: torque, handling, maintenance.
Electric cars are now ready to take over thanks to advances in battery technology and their inherent benefits: torque, handling, maintenance.
Udgivelsesdato
Aug 10, 2019
The Mars Helicopter aims to make the first powered flight on another planet when it takes off on Mars as part of the Mars 2020 mission. I learned a lot getting to visit the drone right before it was mounted on the rover.
The Mars Helicopter aims to make the first powered flight on another planet when it takes off on Mars as part of the Mars 2020 mission. I learned a lot getting to visit the drone right before it was mounted on the rover.
Udgivelsesdato
Aug 16, 2019
I used a nitrogen membrane and Stirling cryocooler to liquefy nitrogen out of the air.
I used a nitrogen membrane and Stirling cryocooler to liquefy nitrogen out of the air.
Udgivelsesdato
Aug 31, 2019
We put aerogel to the test vs 'not-a-flamethrower', a huge 2000°C flame to a large fiberglass blanket infused with silica aerogel - formerly the lightest solid (that title is now held by graphene aerogel).
We put aerogel to the test vs 'not-a-flamethrower', a huge 2000°C flame to a large fiberglass blanket infused with silica aerogel - formerly the lightest solid (that title is now held by graphene aerogel).
Udgivelsesdato
Sep 13, 2019
A planet has been predicted to orbit the sun with a period of 10,000 years, a mass 5x that of Earth on a highly elliptical and inclined orbit. What evidence supports the existence of such a strange object at the edge of our solar system?
A planet has been predicted to orbit the sun with a period of 10,000 years, a mass 5x that of Earth on a highly elliptical and inclined orbit. What evidence supports the existence of such a strange object at the edge of our solar system?
Udgivelsesdato
Sep 19, 2019
Spinning objects have strange instabilities known as The Dzhanibekov Effect or Tennis Racket Theorem - this video offers an intuitive explanation.
Spinning objects have strange instabilities known as The Dzhanibekov Effect or Tennis Racket Theorem - this video offers an intuitive explanation.
Udgivelsesdato
Okt 04, 2019
On first glance it's surprising that origami -- a centuries old art of folding paper to achieve particular aesthetics -- is applicable to engineering. But upon closer consideration there
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On first glance it's surprising that origami -- a centuries old art of folding paper to achieve particular aesthetics -- is applicable to engineering. But upon closer consideration there are a lot of reasons methods developed for paper folding are also applicable to engineering: origami allows you to take a flat sheet of material and convert it to almost any shape only by folding. Plus for large flat structures, origami provides a way of shrinking dimensions while ensuring simply deployment - this is particularly useful for solar arrays in space applications. Furthermore, motions designed to take advantage of the flexibility of paper can also be used to form compliant mechanisms for engineering like the kaleidocycle. Since the principles of origami are scalable, mechanisms can also be dramatically miniaturized.
Udgivelsesdato
Okt 25, 2019
Huge thanks to all the YouTubers who organized this. My apologies for the repost.
These videos are from 2012 so my interest in trees goes back a long ways. I think these videos discuss
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Huge thanks to all the YouTubers who organized this. My apologies for the repost.
These videos are from 2012 so my interest in trees goes back a long ways. I think these videos discuss two of the most interesting and amazing facts about our leafy friends: they are made mostly of CO2 (which comes from us breathing out amongst other sources) and they can transport water up a tube higher than any we can currently manufacture. So trees are out to get you. But we do much worse to them so we owe it to them to plant some more. 20 mil is a good start.
Udgivelsesdato
Nov 20, 2019
Why does shaken soda explode? Does ice melt first in fresh or salt water?
Why does shaken soda explode? Does ice melt first in fresh or salt water?
Udgivelsesdato
Dec 06, 2019
Chaos theory means deterministic systems can be unpredictable.
Chaos theory means deterministic systems can be unpredictable.
Udgivelsesdato
Dec 14, 2019
Scientists like Prof Sinclair have evidence of speeding up, slowing, and even reversing aging.
Scientists like Prof Sinclair have evidence of speeding up, slowing, and even reversing aging.
Udgivelsesdato
Dec 28, 2019
Common pitfalls of New Year's resolutions and how I plan to avoid them.
Common pitfalls of New Year's resolutions and how I plan to avoid them.
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