December 21, 2025
Marie and Pierre Curie Discover Radium (1898)
Scientists Marie and Pierre Curie were working with pitchblende, a heavy mineral known to contain the radioactive element uranium, when they noticed something unusual. Somehow, the pitchblende was more radioactive than the uranium it contained. The culprit was radium, a previously unknown element present in pitchblende only in trace amounts—yet more than a million times more radioactive than uranium. What common household products contained radium until it was discovered to be dangerous? Discuss
December 20, 2025
Spanish Prime Minister Luis Carrero Blanco Is Assassinated (1973)
When Spanish leader Francisco Franco appointed Carrero Blanco to the office of prime minister in 1973, the new premier was expected to uphold Franco's regime—including a plan to eventually restore the Spanish monarchy. Months later, Carrero Blanco was killed by a bomb that exploded under his car as he was leaving mass in Madrid. Though Spain may have moved closer to democracy after Carrero Blanco's death, that was not necessarily the intended goal of the bombing. Who was responsible for it?
December 19, 2025
Titanic Released in US Theaters (1997)
Before Titanic was released, some film critics predicted that it would be a box office disaster. At the time, it was the costliest film ever made, and production delays had pushed the release date far past the lucrative summer season. Yet by the end of its first weekend, the three-hour-long film was selling out theaters. It won 11 Academy Awards and remained the highest-grossing film in history for 12 years. What important historical fact did the director choose to omit from the film?
