What causes cavities? - Mel Rosenberg
AdultsEducationHealthHumanScienceHistory... 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
AdultsHistoryLifeNatureScienceEnvironment... Methuselah’s environment lacks nutrients, water, and oxygen. In other words, it’s the perfect place to grow very very old.
How Can We Store Renewable Energy?
AdultsConstructionScienceTechnologyEnvironmentEnergy... Decarbonizing our power production is vitally important if we want to curtail climate change, but there are some major logistical issues we’re going to have to overcome before we can do that.
Primitive Technology: Cane Water Filter/Siphon
AdultsConstructionEducationNatureDIYHow-toScience... I made a water filter from cane that siphons clean water from a dirty water while simultaneously using the xylem present in the the cane as a filter.
Why Do Heart Attacks Cause *Arm* Pain?
AdultsHealthHumanScience When the brain receives pain from an internal organ, it often projects the pain in the wrong place because of the way sensory nerve paths converge.
How To Terraform Mars - WITH LASERS
AdultsDesignScienceSpaceFuture... Mars is a disappointing hellhole lacking practically everything we need to stay alive. It looks like we’ll only ever have small crews spend a miserable time hidden underground.
When Was The Worst Time In History To Die?
AdultsHealthHistoryHumanScience... 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.
AdultsHealthHistoryHumanScience... 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
AdultsConstructionHistoryScienceSpaceTechnology... 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
AdultsHistoryHumanScienceCulture... 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.
Black Hole Star – The Star That Shouldn't Exist
AdultsEducationScienceSpace Black hole stars may have been the largest stars to ever exist. They burned brighter than galaxies and were Larger than any star today or that could ever exist in the future.
Why do you want to squeeze cute things?
AdultsHumanPsychologyScience Explore the psychology of the phenomenon known as cute aggression, which is the urge to squeeze, bite or pinch something cute.
3 Ways Of Seeing Invisible Air Flow
AdultsEducationScienceExperiments In this lab, they use different flow visualization techniques to help detect contraband, residues, and develop trace particle detection methods.
Intro to Geology
AdultsEducationLifeScienceGeology... Geology is the study of planet Earth, its origin and evolution, its fundamental structure, the properties of minerals, rocks, and fluids of which it is composed, and the evolution of its biosphere.