PBS
The Real Science of the EHT Black Hole
So, how do you take a picture of a black hole? The beast in question is the supermassive black hole in the center of this – the M87 elliptical galaxy. It has an estimated mass of several billion times that of the Sun, which gives it an...
MinutePhysics
Why is it Harder to Drive Backwards?
One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute!
TED Talks
TED: Why Africa needs community-led conservation | Resson Kantai Duff
Conservation efforts in Africa have typically been led by "parachute conservationists" -- outsiders who drop in thinking they have all the answers, hire locals to implement them and then disappear. But conservationist Resson Kantai Duff...
Crash Course
Bureaucracy Basics: Crash Course Government and Politics
This week Craig Benzine discuses bureaucracies. Bureaucracies tend to be associated with unintelligible rules and time-wasting procedures, but they play an important, though controversial, role in governing. From the FDA to the EPA,...
Bozeman Science
Electric Field of Parallel Plates
In this video Paul Andersen explains how the electric field between oppositely and equally charged plates is uniform as long as you are far from the edge. The strength of the electric field can be determined by either the charge of the...
SciShow
Its True The Sun Really Does Flash Green
The mythical green flash at sunset isn't actually a myth! Stefan explains why it happens, and how you can see it.
TED-Ed
TED-Ed: How to squeeze electricity out of crystals - Ashwini Bharathula
It might sound like science fiction, but if you press on a crystal of sugar, it will actually generate its own electricity. This simple crystal can act like a tiny power source because sugar happens to be piezoelectric. Ashwini...
Bozeman Science
The Factor-Label Method
Mr. Andersen shows you how to use the factor label method to solve complex conversions.
Curated Video
Meiosis
A type of cell division important to produce sex cells such as eggs and sperm. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...
Curated Video
Homogeneous mixture
A mixture of two or more substances which appears to be a single, uniform medium, with no visible separation between its components. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
Curated Video
Filtration - Solid-Fluid Separation
The physical separation of a solid from a fluid carrier, either gas or liquid, by passing it through a medium that blocks particles above a certain size. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
Curated Video
Compound
A substance composed of more than one chemical element, whose atoms are held together by strong chemical bonds and are combined in a fixed ratio. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
Curated Video
Heterogeneous mixture
A mixture of two or more substances which remain as physically separate substances. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
Curated Video
Thunder and Lightning
Thunderstorms can be an impressive sight, but how are they formed? What is happening deep inside certain clouds to create such huge bolts of energy? Earth Science - Weather - Learning Points. Thunderstorms form in dense tall clouds...
Curated Video
Origin of Species
How are new species created? An insight into the key evolutionary processes, played out over many generations, which lead to speciation. Biology - Adaptation And Evolution - Learning Points. We all originate from a single cell, so why...
Curated Video
Filtration and Evaporation
We use filtration and evaporation to separate out a mixture of water, sand and salt. The sand is removed using filtration, as it did not dissolve in the water. The remaining solution is heated until the water evaporates, leaving behind...
Curated Video
Leaf Chromatography
We separate the different pigments in a beech leaf using chromatography. The leaf is broken up and ground with sand and propanone before being transferred to some chromatography paper. This is then lowered into pigment solvent and we can...
Curated Video
Distillation of Ink
We use distillation to remove the water from ink. The ink is heated in a conical flask with a delivery tube running to a beaker. The water has a lower boiling point and so it evaporates before the ink. The water condenses as it travels...
Curated Video
Felt Tip Chromatography
We use chromatography to see what colours make up the ink in different coloured felt tip pens. Different coloured dots are drawn on a piece of chromatography paper and this is lowered into a chromatography jar containing water. We watch...
Curated Video
Cloning
A look at natural cloning and the main artificial cloning techniques devised by man, including embryo transplant and fusion cell cloning. Biology - Cells And DNA - Learning Points. Cloning occurs naturally in asexual reproduction in...
Curated Video
Degrees of Separation: Erdős
Paul Erdős is the most published mathematician ever. To such an extent that now everyone in the world has an assigned 'Erdős number', showing the degrees of separation between their work and his! Maths - History Of Maths A Twig Math...
Curated Video
Separation by sieving – Big reveal
What is it? ... It's flour being sieved! Material processes - Separating mixtures - Separation by sieving A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the...
Curated Video
Other means of separation – Big reveal
What is it? ... It's chromatography! Material processes - Separating mixtures - Other means of separation A Twig Tidbit Film - Big Reveal. The image zooms out from an extreme close-up to full frame. The children have to guess what the...
Curated Video
Other means of separation – True or false
True or false ... Wind can be used as a means of separation? Material processes - Separating mixtures - Other means of separation Learning Points Wind can be used to separate heavy grains and light husks of wheat. A Twig Tidbit Film -...