There exists an unequivocal distinction between the sound produced by a static source and that produced by a moving one, especially when the source moves towards or away from the microphone.

Latin megastar Bad Bunny performed a medley of his top hits at the Super Bowl on Sunday in a star-studded show that was criticised as terrible by the US president. The Puerto Rican singer, also known as Benito Antonio Martinez Ocasio, was joined on stage by a host of fellow music stars including Lady Gaga, Ricky Martin and Cardi B. Sitting in the stands, Kim Kardashian and Lewis Hamilton made their first major public appearance together, after weeks of speculation about their romance. The seven-time Formula 1 world champion and the reality TV star were spotted chatting and smiling together during the game, and were caught on video by NBC News. Fellow musical superstars Lady Gaga, Cardi B and Jessica Alba joined the dancers on stage alongside Bad Bunny, who was the world's most-played artist in 2025 on Spotify, according to the streaming service. Chilean-American actor Pedro Pascal and Puerto Rican singer Ricky Martin also joined the performance, which was populated by a largely pan-American crowd of celebrities.

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Paul Erdős was one of the most prolific mathematicians to ever live, known for showing up at the door of others in the field and declaring they should host and feed him while they do maths together. I come to you with something a little different for my latest maths column - a plea to Hollywood to make a comedy biopic about one of the greatest mathematicians of all time, Paul Erdős. Why is Erdős (pronounced "air-dish") deserving of such acclaim? With almost 1500 papers to his name, he is probably the most prolific mathematician that ever lived, and possibly that will ever live. Unsurprisingly, with that many papers, he is known for his work across many areas of maths, from probability to number theory to graph theory.

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