Phonons are sound particles or quantized vibrations of atoms in solid materials. The Debye model, a theory introduced by ...

Google's latest doodle in India celebrates the quadratic equation, ax² + bx + c = 0, showcasing its real-world applications ...

Kara Greenberg is a senior news editor for Investopedia, where she does work writing, editing, and assigning daily markets and investing news. Prior to joining Investopedia, Kara was a researcher and ...

A woman casts her vote on the day of Cameroon's presidential election at a polling station in Garoua, Cameroon on October 12, 2025. Desire Danga Essigue/ REUTERS Regardless of who is announced as the ...

Past Crashes, Future Gains? What History Suggests for U.S. Tech Stocks in 2026. Trump Warns of Threat to Social Security, Medicare Exclusive: Three-star general pushed out amid tensions with Hegseth ...

A disgraced Secret Service agent and a Jesuit priest set out to solve the JFK assassination in Dead Ringer the author’s paranoid new thriller. The assassination was an inflection point in U.S. history ...

Former President Barack Obama says that the United States is at “an inflection point” following the assassination of conservative activist Charlie Kirk and that President Donald Trump has further ...

Former President Barack Obama insists the nation is at an “inflection point” following Charlie Kirk’s assassination as the Democrat in his first public remarks on the shooting called the conservative ...

I read Kevin Cullen’s commentary on the sectarian conflict in Northern Ireland and its applications to the events of today with a deep sense of foreboding (“Once you make excuses for murder, it’s over ...

This is read by an automated voice. Please report any issues or inconsistencies here. Obama said that in the aftermath of Charlie Kirk’s killing, President Trump has done more to divide the country ...