How Do Breathalyzers Work?
Using a chemical reaction or infrared spectroscopy to measure alcohol vapor in breath.
How Do Smartwatches Measure Heart Rate?
Photoplethysmography: using green light to track blood flow under your skin.
How Do Vaccines Work?
Training our immune system to recognize and fight pathogens without causing the disease.
How Do Water Filters Work?
Using physical barriers, chemicals, or biological processes to remove impurities.
What is Homeopathy?
Exploring the deeply flawed pseudoscience of treating ailments with heavily diluted substances.
What is the difference between a Virus and Bacteria?
Viruses need a host to multiply, while bacteria are single-celled, self-reproducing organisms.