Why people never smiled in old photos
Adults HistoryEarly portraits looked pretty grim. A lot of old photos from the 19th and early 20th century are fraught with doom and gloom-and on the occasion the literal dead face. That led to the popular belief that people just did not smile in old photographs. The common explanation is due to the limited technology at the time to capture a smile. Exposure times were long and the thinking was it's easier to hold a serious expression over a long period. Another theory included early photography being heavily influenced by painting (which meant no smiling).
How ancient Romans made stronger concrete than today
Adults HistoryMany structures built by ancient Romans around 2,000 years ago are still standing, and some are still in excellent condition. Over the last decade, researchers have come discover the Romans' secret concrete recipe that has maintained so many of its now-ancient buildings.
How the Pyramids Were Built (Pyramid Science Part 2!)
Adults HistoryJust because something is difficult doesn't mean it's impossible. Over the past centuries, archaeologists, historians, and engineers have reconstructed a great deal of the technology and science used to build the Egyptian pyramids. This week we look at ancient Egyptian mathematics, building techniques, tools, and culture to reconstruct the Great Pyramid's construction.
Where did English come from? - Claire Bowern
Adults HistoryWhen we talk about 'English', we often think of it as a single language. But what do the dialects spoken in dozens of countries around the world have in common with each other, or with the writings of Chaucer? Claire Bowern traces the language from the present day back to its ancient roots, showing how English has evolved through generations of speakers.
How to use rhetoric to get what you want - Camille A. Langston
Adults HistoryHow do you get what you want, using just your words? Aristotle set out to answer exactly that question over two thousand years ago with a treatise on rhetoric. Camille A. Langston describes the fundamentals of deliberative rhetoric and shares some tips for appealing to an audience's ethos, logos, and pathos in your next speech.
The philosophy of Stoicism - Massimo Pigliucci
Adults HistoryWhat is the best life we can live? How can we cope with whatever the universe throws at us and keep thriving nonetheless? The ancient Greco-Roman philosophy of Stoicism explains that while we may not always have control over the events affecting us, we can have control over how we approach things. Massimo Pigliucci describes the philosophy of Stoicism.
What can you learn from ancient skeletons? - Farnaz Khatibi
Adults HistoryAncient skeletons can tell us a great deal about the past, including the age, gender and even the social status of its former owner. But how can we know all of these details simply by examining some old, soil-caked bones? Farnaz Khatibi examines a fascinating branch of science known as biological anthropology.
The ferocious predatory dinosaurs of Cretaceous Sahara - Nizar Ibrahim
Adults HistoryIn Cretaceous times (around 100 million years ago), North Africa was home to a huge river system and a bizarre menagerie of giant prehistoric predators -- including the Spinosaurus, a dinosaur even more fearsome than the Tyrannosaurus rex. Nizar Ibrahim uses paleontological and geological data to reconstruct this "River of Giants" in surprising detail.
How the bendy straw was invented | Moments of Vision 12 - Jessica Oreck
Adults HistoryToday, Americans use an estimated 500 million drinking straws every day. But where did the idea for this beloved utensil come from? In the twelfth installment of our 'Moments of Vision' series, Jessica Oreck shares the origins of the bendy straw.
How tap dancing was made in America
Adults HistoryTap dancing originated in America. It's a mix of several dance styles-Irish jigging, British clogging, and the percussive steps from African dance. Tap dancing can be traced back to Five Points, now known as Chinatown in New York city. Tap dance also has its roots in minstrel shows, where it was viewed as American comedy. In the 70s, tap dancing legends, Jane Goldberg and Brenda Bufalino took tap from the bright show tune lights of Broadway back to a place of self expression.
The history of tea - Shunan Teng
Adults HistoryTea is the second most consumed beverage in the world after water -- and from sugary Turkish Rize tea to salty Tibetan butter tea, there are almost as many ways of preparing the beverage as there are cultures on the globe. Where did this beverage originate, and how did it become so popular? Shunan Teng details tea's long history. Lesson by Shunan Teng, animation by Steff Lee.
A brief history of goths - Dan Adams
Adults HistoryWhat do fans of atmospheric post-punk music have in common with ancient barbarians? Not much ... so why are both known as "goths"? Is it a weird coincidence - or is there a deeper connection stretching across the centuries? Dan Adams investigates. Lesson by Dan Adams, animation by Globizco.