A spot-billed pelican sits on a street light in Colombo on March 16, 2021. (Photo by Ishara S. Kodikara/AFP Photo)

A “jungle nymph” is measured during the annual weight-in ZSL London Zoo on August 21, 2014 in London, England. The height and mass of every animal in the zoo, of which there are over 16,000, is recorded and submitted to the Zoological Information Management System. This is combined with animal measurement data collected from over 800 zoos and aquariums in almost 80 countries, from which zoologists can compare information on thousands of endangered species. (Photo by Oli Scarff/Getty Images)

A family pose for a picture as thousands of redheads fill a Dutch city Breda to celebrate International Redhead Day event in Breda, The Netherlands on Sunday, 4 September 2016. Every year natural redheads from more than 80 countries come together at “Roodharigendag” annual weekend long festival to celebrate their ginger genes. The event also holds the world record for the largest number of natural redheads being in one place. (Photo by Akmen/London News Pictures)

British-American actress and model Lily Collins (R) celebrates wrapping up the latest season of “Emily in Paris” in the last decade of September 2022. (Photo by lilyjcollins/Instagram)

Italian-American actress and model Julia Fox is seen on February 15, 2023 in New York City. (Photo by Rachpoot/Bauer-Griffin/GC Images)

American reality television personality, model and social media personality Kylie Jenner seen on June 16, 2018 in Los Angeles, California. (Photo by Splash News and Pictures)

Iggy Azalea shares a joke with Andy Lee and Hamish Blake during Bonds 100th birthday celebration event at Cafe Sydney on August 19, 2015 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

Skeleton involves a person riding a small sled down a frozen track while lying face down. The sport is a more intense form of luge because skeleton competitors leap onto the sled and slide downhill head first. Skeleton athletes can reach up to 80 mph on straightaways, causing forces up to 5g, so the helmet is a critical component for attitude as well as safety.