Bayes' theorem is a statistical formula used to calculate conditional probability. Learn how it works, how to calculate it ...

Risk prediction has been used in the primary prevention of cardiovascular disease for >3 decades. Contemporary cardiovascular risk assessment relies on multivariable models, which integrate ...

Right now, molecules in the air are moving around you in chaotic and unpredictable ways. To make sense of such systems, physicists use a law known as the Boltzmann distribution, which, rather than ...

Background Spirometry is a measure of lung function used to make clinical decisions regarding the diagnosis and management of ...

If someone told you that they were “probably” going to have pasta for dinner, but you later found out that they ate pizza, would you feel surprised – or even lied to? More seriously, what does it mean ...

Humans respond to environments that change at many different speeds. A video game player, for example, reacts to on-screen events unfolding within hundreds of milliseconds or over several seconds. A ...

The new year is here, and as we move through the first full week many people are reeling from returning to work, and remembering all the responsibilities they set aside during the holidays. If you've ...

The Paradox of Purpose The idea that purpose must be grand leads to stress and feelings of inadequacy. The key is to focus on “little” purpose: those tiny moments in which you are most alive. By ...

There's more to watch than ever before, but perhaps you still find yourself idly flicking through the “What's New” carousel on Netflix and not seeing anything that really grabs you … so then you do ...

Elizabeth Guevara is a personal finance reporter who explains the world of business and economics and how it impacts your finances. She joined Investopedia in 2024. Investopedia / Photo Composite by ...

The economy has had a volatile year marked by ongoing headwinds and uncertainties. Persistent inflation, unpredictability around tariffs, and a stock market that many fear is in the midst of an ...

If your 2025 YouTube history is a mashup of music videos, cooking clips, sports highlights and late-night "how did I get here?" rabbit holes, then there is a new way for you to look back at your year ...