The Boston Celtics dancers perform during the second quarter of the game between the Boston Celtics and the Miami Heat at TD Garden in Boston, Massachusetts on December 2, 2024. (Photo by Winslow Townson/USA Today Sports)

British driver Elfyn Evans and co-driver Scott Martin compete in their Toyota GR Yaris Rally1 during the Artigas stage of the WRC Rally Paraguay, 10th stage of the FIA World Rally Championship (WRC), near Encarnacion, Paraguay on August 30, 2025. (Photo by Luis Robayo/AFP Photo)

Brazilians celebrate at the annual New Year's Eve beach party on December 31, 2011 for the Copacabana Reveillon in Rio De Janeiro, Brazil. (Photo by Konrad Fiedler/Getty Images)

“Sperm whale opening it's huge mouth, Ogasawara Islands, Japan. Sperm whales are the biggest carnivorous animals on the planet. Each teeth in the mouth of adult specimen weights more than 1 kilogram. Interestingly enough that modern marine biologists believe that these teeth despite being fearsome play little role in capturing and eating giant squid – with their main function being mainly ritual aggression between males!”. (Photo by Alexander Safonov)

Maratus is a spider genus of the Salticidae family (jumping spiders). These spiders are commonly referred to as peacock spiders due to their colorful abdominal flaps that they display during courtship. In at least one species, Maratus vespertilio, the expansion of the flaps also occurs during ritualised contests between males. All described species, except M. furvus, are endemic to Australia. (Photo by Jurgen Otto)