Real life sunken cities
AdultsCitiesHistoryScience...Though people are most familiar with Plato's fictional Atlantis, many real underwater cities actually exist. Peter Campbell explains how sunken cities are studied by scientists to help us understand the lives of our ancestors, the dynamic nature of our planet, and the impact of each on the other.
Can You Start a Fire with a Sandwich Bag?
AdultsCreativityLifeNature...Did you know you can start a fire with a ziploc bag, a bit of water, and the power of the sun? Here's how to do it step-by-step.
Orchids: The Masters Of Lying, Cheating & Stealing
AdultsEnvironmentNatureThanks to Curtin University and the University of Western Australia for sponsoring this video. Also, special thanks to Kingsley Dixon and the Orchid Specialist Group of the IUCN's Species Survival Commission.
The Real Reason Leaves Change Color In the Fall
AdultsEnvironmentNatureThe chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.
The threat of invasive species
AdultsEnvironmentNatureScienceMassive vines that blanket the southern United States, climbing high as they uproot trees and swallow buildings. A ravenous snake that is capable of devouring an alligator. Rabbit populations that eat themselves into starvation.
Woven bark fiber
AdultsConstructionNatureTechnology...I made a rough type of textile from bark fibre. This is the same tree I use for making cordage though I don't know its name. It has been raining a lot here lately (the video also shows how well the hut stands up to rain) and this caused a large wattle tree to fall down taking a few smaller trees with it.
Why is Mount Everest so tall?
AdultsNatureWorldScience...At 8,850 meters above sea level, Qomolangma, also known as Mount Everest, has the highest altitude on the planet. But how did this towering formation get so tall? Michele Koppes peers deep into our planet's crust, where continental plates collide, to find the answer.