1) The development of voice recognition technology has led to the widespread use of virtual assistants such as Siri, Alexa, and Google Assistant.

2) The Amazon rainforest produces more than 20% of the world's oxygen.

3) The musical "Les Misérables" is one of the longest-running shows in the West End and Broadway, with over 13,000 performances.

4) The first sound film, "The Jazz Singer," was released in 1927 and marked the transition from silent movies to "talkies."