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Scientists measure calories by burning food in a bomb calorimeter to record the heat released or by calculating energy from macronutrients. Knowing how do they measure calories helps you understand the energy labels on every snack or meal you buy. This process has shifted over the years from direct physical testing to mathematical modeling based

Scientists measure an earthquake by using seismographs to record ground motion and calculating the magnitude or intensity based on the energy released. When the ground begins to shake, people often want to know two things: how big was it and how much damage did it do? These questions represent two different ways we track seismic

They make salt by evaporating sea water through solar heat or mining underground mineral deposits using specialized machinery and brine solutions. Salt is a staple in every kitchen, but the way it reaches your table involves a mix of ancient tradition and modern science. Most people don’t think twice about those tiny white crystals until

Florists create rainbow roses by splitting the stem of a white rose into sections and placing each part into different colored water. Seeing a rose with petals that shift from neon blue to bright yellow and deep purple feels like a trick of the eye. These flowers do not grow this way in nature; instead,

They make milk lactose free by adding the lactase enzyme to regular dairy, which breaks down lactose into easily digestible glucose and galactose sugars. Milk is a staple in many kitchens, but for those with a body that cannot handle milk sugar, it can lead to physical discomfort. To solve this problem, dairy processors use

Most melatonin supplements are made in labs using a chemical synthesis process that combines various precursors to mimic the hormone naturally produced by humans. Melatonin has become a household name for anyone struggling to find a solid night of rest. While our brains produce this hormone in the pineal gland, the bottles you see on

Magnets are made by melting specific metals like iron, nickel, or cobalt together and then exposing the cooled alloy to a powerful magnetic field. Most people see magnets as simple tools that stick to fridge doors or power speakers. But the process of creating these magnetic tools involves intense heat, careful chemical balancing, and massive

Scientists make insulin by inserting the human insulin gene into bacteria or yeast, which then act as tiny factories to produce the hormone. Living with diabetes once meant relying on insulin harvested from the pancreases of cows and pigs. While this saved lives, it was far from perfect. Some people had allergic reactions, and the

Manufacturers make fart spray by mixing sulfur-based organic compounds, like skatole and thiols, with water and pressurized propellants to create foul odors. The science of bad smells involves a lot more than just mixing garbage. When you press the nozzle on a can of stink spray, you are releasing a carefully engineered chemical cocktail designed

Manufacturers create dry ice by cooling and compressing carbon dioxide gas into a liquid before expanding it to form solid snow. Dry ice sits at a chilly -109.3 degrees Fahrenheit, making it a staple for shipping perishables and creating stage fog. Unlike regular ice made from water, this substance skips the liquid phase entirely when