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Why did early humans have straight teeth without orthodontics?
“According to the fossil record, ancient humans usually had straight teeth, complete with wisdom teeth. In fact, the dental dilemmas that fuel the demand for braces and wisdom teeth extractions today...
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To Scale: TIME, a short film that visualizes 13.8 billion years
Seconds, minutes, hours, days, months, years, decades, and even a century. As aging humans, we can experience this, imagine this, and to a certain extent, understand this. But how can we understand...
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What is Botany? Alexis Nikole Nelson explains with Crash Course Botany
Botany is the scientific study of plants, and it’s full of drama, intrigue, history, and oodles of small yet essential things that happen every single day. In fact, “it’s no overstatement to say our...
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How to make quill pens from bird feathers
With large white wing feathers from swans and darker wing feathers from Canada geese, professional calligrapher Patricia Lovett can make quill pens like the ones that were used from around the 6th to...
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Pride: The Story of Harvey Milk and the Rainbow Flag
“On June 25, 1978, history was made when a new flag unfurled in San Francisco. From that moment forward, the flag and its rich, beaming colors of the rainbow would serve as a symbol of hope and pride...
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What is Juneteenth?
When did slavery end in the United States? And what is Juneteenth? This TED-Ed lesson by author Karlos K. Hill and historian Soraya Field Fiorio introduces June 19th, 1865, the date known as...
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How was Stonehenge created?
“There are hundreds of myths and legends about the creation of Stonehenge, the most colourful of which involve the likes of giants, Merlin, and even aliens! Obviously, this is not the case. “The truth...
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Matiate, the hidden underground city beneath Midyat, Turkey
Over 40 ancient underground shelters, have been unearthed by archeologists in Turkey, Derinkuyu being the most famous. But the underground city beneath Midyat is proving to be one of the largest. It’s...
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The history of the Ferris wheel
The Ferris wheel, an iconic symbol of amusement and spectacle, has captivated the imaginations of people worldwide for over a century, and today there are Ferris wheels of all sizes in cities, fairs,...
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Tunnel Books: The art and history of immersive 3D scenes
Books have taken a variety of forms throughout their long history, from clay tablets to papyrus scrolls, from accordion fold books to today’s pages held together with a central spine. Tunnel books are...
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Pepper’s Ghost: How to make this Victorian era parlor trick
Victorian-era English scientist John Henry Pepper was a lecturer with a flare for theatrics. In the mid-1800s, he teamed up with civil engineer Henry Dircks to popularize a ghostly illusion that’s now...
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What is the biggest migration on Earth?
“Over 200 years ago, a naturalist in France noticed small crustaceans appearing and disappearing on a pond’s surface in a diurnal pattern—present at night, gone during the day. This observation was a...
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Walking with Giants: How did huge stone moai move across Rapa Nui?
How do you move a 14-ton stone monolith over miles of rough island terrain? How do you move 900 of them, some weighing as much as 82 tons? For generations, archaeologists and anthropologists have asked...
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The Recorder: What can this centuries-old instrument really sound like?
Do you have a plastic recorder at home or does your school have them in music class? The recorder may be viewed as a beginner’s instrument, or even a toy, but those perceptions can be contradicted when...
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What goes inside this 17th-century dolls’ house?
There are pillows to be placed on the bed, plates to be put away in the kitchen, and chairs to be arranged at the table. Handmade in Germany in 1643, the delicate Nuremberg Dolls’ House is a rare and...
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Jewels of the Forest: Kaua’i’s Endangered Honeycreepers
Millions of years ago, finches were likely blown off-course by storm winds, and found themselves in the safe haven of the predator-free Hawaiian Islands. Over time, these birds diversified and thrived,...
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Why Do Flowers Exist? Gymnosperms, angiosperms, and how seeds evolved
How do seeds travel from one place to another? Why do flowers have different colors and shapes, and how do some turn into fruits? How did these two types of reproduction evolve? And why are seeds and...
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Amazing Maize, a 1933 Secrets Of Nature short
Come for the pioneering stop-motion photography, stay for the jaunty 1930s soundtrack: Amazing Maize follows the life cycle of a humble corn kernel from crowded cob, one of 400 – 600 seeds, to...
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Edison’s 1877 Tinfoil Phonograph, a NMAH demonstration
“Mr. Thomas A. Edison recently came into this office,” a December 1877 Scientific American article describes, “placed a little machine on our desk, turned a crank, and the machine inquired as to our...
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Cottage Pudding and Lemon Sauce, a Victorian era recipe
What was it like to bake a Victorian era dessert in Canada’s Kitchener-Waterloo region during the early 1900s? Journey back in time with this serene video from Parcs Canada, featuring a recipe for...
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