Brain-on-a-chip. Dazzling in green and magenta this image shows the nerve fibres (in green) produced by neural stem cells (in magenta) as they grow on a synthetic gel. Captured by a technique known as confocal microscopy, the image is part of research shedding light on how tinkering with the environment can affect the way in which nerve fibres grow. (Photo by Collin Edington and Iris Lee/Massachusetts Institute of Technology/Wellcome Images)

New York Islanders' Matt Martin (17) and Pittsburgh Penguins' Zach Aston-Reese (12) fight during the second period in Game 2 of an NHL hockey Stanley Cup first-round playoff series in Pittsburgh, Tuesday, May 18, 2021. Both players received a two-minute minor penalty. (Photo by Gene J. Puskar/AP Photo)

Kyla Drumm, 5, waits after receiving the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine in Skippack, Pennsylvania, U.S., November 3, 2021. (Photo by Hannah Beier/Reuters)

General view of a clash after the match of the Egyptian Premier League between Pyramids FC and Zamalek at the 30 June Air Defense Stadium in Cairo, Egypt on April 23, 2019. (Photo by Amr Abdallah Dalsh/Reuters)

Jake Paul (left) lands a punch to the face of Anderson Silva during a boxing match at Desert Diamond Arena in Glendale, Arizona on October 29, 2022. (Photo by Mark J. Rebilas/USA TODAY Sports)

Boxer Tommy Fury is pictured during a weight measurement, a day ahead of a match against Jake Paul (not pictured) in Riyadh, on February 25, 2023. (Photo by Fayez Nureldine/AFP Photo)

Peter Carberry riding Gabbys Cross falls off during the Randox Grand National Chase during day three of the Randox Grand National Festival at Aintree Racecourse on April 15, 2023 in Liverpool, England. (Photo by Michael Steele/Getty Images)

Cybermen patrol the National Museum of Scotland before the opening of the Doctor Who Worlds of Wonder exhibition in Edinburgh, Scotland on Wednesday, December 7, 2022. (Photo by Murdo MacLeod/The Guardian)