What causes cavities? - Mel Rosenberg
Adults History
When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes.
The 3 Reasons This Tree Has Lived 5000 Years
Adults History
Methuselah’s environment lacks nutrients, water, and oxygen. In other words, it’s the perfect place to grow very very old.
When are you actually an adult? - Shannon Odell
Adults History
Explore how scientists define adulthood, and find out if there’s a specific age at which we reach maturity.
Saving Wild Salmon Populations
Adults History
In her film 'Salmon Reflection' Norwegian and Unangax? filmmaker Anna Hoover explores the effects of a changing world on the communities of Bristol Bay, one of the last surviving wild salmon ecosystems.
When Was The Worst Time In History To Die?
Adults History
By combining historical demography and epidemiology, we can (sort of) determine how people throughout history have died.
Explore the three main ways viruses can be driven to extinction, and dig into the possibility of COVID-19 dying out.
Adults History
Viruses are wildly successful organisms. There are about 100 million times as many virus particles on Earth as there are stars in the observable universe.
I tested the US Military’s secret space weapon
Adults History
An engineer came up with a plan to drop tungsten telephone poles from space - the idea has been seriously considered on multiple occasions, so we tested it.
Anthropology’s Greatest Hoax
Adults History
Scientists are sometimes deemed objective observers of the world in which we live, but that’s not entirely true. They’re still human and can find themselves victim to fraudsters just like the lot of us.
Why Do We Release So Much Gas?
Adults History
The carbon dioxide we’re pumping into the air every day is causing unprecedented global warming and climate change.
https://youtu.be/xuRpF9RnrOM
Adults History
Treasure hunting has captured our imaginations for centuries. Draining the oceans reveals the richest wrecks ever found.
What Is The Best Shape For A Farm?
Adults History
The shape of a farm can tell you a surprising amount about the land it's on and the people that use it.
The history of chocolate - Deanna Pucciarelli
Adults History
If you can’t imagine life without chocolate, you’re lucky you weren’t born before the 16th century. Until then, chocolate only existed as a bitter, foamy drink in Mesoamerica.
Machu Picchu 101 | National Geographic
Adults History
Machu Picchu is a testament to the power and ingenuity of the Inca empire. Built without the use of mortar, metal tools, or the wheel, Machu Picchu stands as an archaeological wonder of the ancient world. But why was it built—and deserted?
What makes a poem … a poem? - Melissa Kovacs
Adults History
What exactly makes a poem … a poem? Poets themselves have struggled with this question, often using metaphors to approximate a definition. Is a poem a little machine? A firework? An echo? A dream? Melissa Kovacs shares three recognizable characteristics of most poetry.
Valkyries: The Real Story Behind These Warriors of Legend | Fate & Fabled
Adults History
Vikings were some of the fiercest fighters in human history, using their impressive battle prowess to spread Norse influence between the 8th and 11th centuries.
The Future of Public Health: Crash Course Public Health #10
Adults History
We don’t know what the next big scientific breakthrough is going to be or what futuristic diseases we’ll encounter. But when it comes to our health, we actually have a pretty good idea of what could be next.
Fact vs. Theory vs. Hypothesis vs. Law… EXPLAINED!
Adults History
ome people try to attack things like evolution by natural selection and man-made climate change by saying “Oh, that’s just a THEORY!”
Witchcraft: Crash Course European History #10
Adults History
During our last several episodes, Europe and the European-controlled world have been in crisis. Wars, disease, climate changes, and shifts in religious and political power threw the European world into turmoil.
Flavor Science: What's Really in a Pumpkin Spice Latte
Adults History
If you take a look at an ingredients list, odds are you’ll find natural and artificial flavors somewhere in there.
Which Healthcare System is Best?
Adults History
Are you ready for the understatement of the century? Health care is complicated. Across the 200 or so countries on Earth, there are a lot of different ways people receive health care.
These companies with no CEO are thriving
Adults History
Get to know the different kinds of co-ops, how they work, and how they differ from traditional companies.