Inversion tables flip you upside down to relieve back pain, but does the research support the hype? Here's what they actually do and who should avoid them.
Heat capacity explains how much energy a material absorbs before its temperature rises. Learn how this property shapes climate, cooking, and building design.
Learn how Mycobacterium tuberculosis spreads, infects the body, and causes disease, plus how TB is treated and why drug resistance is a growing concern.