Is Space an Abscence of Things or is It a Thing Itself? [Science Video]

Since the days of Ancient Greece, philosophers and scientists have been wondering: What is space? Is the absence of thingsā€¦ a thing? These questions continued to fascinate physicists in the modern era, leading Isaac Newton, Ernst Mach, and Albert Einstein to wonder about the true nature of the fabric of the cosmos. The search for […]

Starting a Fire With a Water-Filled Sandwich Bag [Video]

The intensity of sunlight on Earth is about 1300 Watts per square meter. When you focus the sun’s rays using a magnifying glass (or in this case sphere of water) you can increase the intensity roughly ten thousand fold. This increases the temperature of wood to its autoignition point starting the reaction with oxygen in […]