Brush your teeth and get cleaned up for the week ahead! These animals answered the call of good dental hygiene. Here: Hamster holds toothbrush. (Photo by Neo Vision/Getty Images/Amana Images RM)

A man sits waiting for a train on the London Underground in 1890, when the platform floors were still made from wooden floorboards. (Photo by Hi-Story/Alamy Stock Photo)

Horses compete in the VEA, VHBPA, and VTA Maiden Claiming Hurdle race during the Virginia Gold Cup Races at Great Meadow on Saturday May 06, 2023 in The Plains, VA. (Photo by Matt McClain/The Washington Post)

A person looks up at the Aurora Australis in Judbury in the Huon Valley, Tasmania on April 24, 2023. (Photo by Toby Schrapel freelance photography/The Guardian)

Aoife Brack (Gorey, Wexford) with Sean Brack on her shoulders having great fun with the Bubble performers at the Kaleidoscope festival in Russborough House, Co. Wicklow, Ireland on July 2, 2023. (Photo by Nick Bradshaw for The Irish Times)

A man rides a golden motorbike on a street in Bangkok, Thailand on August 14, 2020. (Photo by Jorge Silva/Reuters)

Colombia's Harold Tejada climb Plateau des Glieres during the stage 18 of the Tour de France cycling race over 175 kilometers (108.7 miles) from Meribel to La Roche-sur-Foron, France, Thursday, September 17, 2020. (Photo by Thibault Camus/AP Photo)

A medical worker in protective gear sprays mist on her colleague during a hot day at an outdoor clinic for coronavirus tests at a public health facility in the southwestern city of Gwangju, South Korea, 05 June 2020. (Photo by Yonhap/EPA/EFE)