Titanoboa, meaning "titanic boa," is an extinct genus of snake that lived approximately 60–58 million years ago, during the Paleocene epoch, a 10-million-year period immediately following the dinosaur extinction event. The only known species is Titanoboa cerrejonensis, the largest, longest, and heaviest snake ever discovered, which supplanted the previous record holder, Gigantophis.

A full-scale model of the snake was unveiled at New York City's Grand Central station before the exhibit opens at the Smithsonian in Washington DC.

Joseph Szabo was a frustrated high-school teacher in need of inspiration – so he started photographing his students, and captured all the angst and excitement of being caught between childhood and adulthood. Here: “Priscilla”, 1969. (Photo by Joseph Szabo/Courtesy of Michael Hoppen Gallery/The Guardian)

In this Wednesday, August 20, 2014 photo released by Red Bull, Maikel Melero of Spain warms up prior to the fifth stage of the Red Bull X-Fighters World Tour in the South African savanna of Pretoria, South Africa. (Photo by Joerg Mitter/AP Photo/Red Bull)

Women kiss each other as people celebrate outside the Stonewall Inn in the Greenwich Village neighborhood of New York June 26, 2015. The Supreme Court ruled on Friday that the U.S. Constitution provides same-s*x couples the right to marry, handing a historic triumph to the American gay rights movement. (Photo by Eduardo Munoz/Reuters)

English fashion model Daisy Lowe seen at LFW s/s 2018: Off-White x Mytheresa.com – intimate dinner at St John Bar & Restaurant during London Fashion Week September 2017 on September 17, 2017 in London, England. (Photo by MagicMoments UK)

Model Bella Hadid poses on the red carpet of Rihanna's new Savage X Fenty collection show for New York Fashion Week at the Barclays Center in the Brooklyn borough of New York, U.S., September 10, 2019. (Photo by Shannon Stapleton/Reuters)

A model presents creations by Indian designers Paras and Shalini during the Fashion Design Council of India (FDCI) Lakme Fashion Week (LFW) in Mumbai, India, 15 March 2024. The FDCI x Lakme Fashion Week runs from 13 to 17 March 2024. (Photo by Divyakant Solanki/EPA)

West Berliners crowd in front of the Berlin Wall as they watch East German border guards demolish a section of the wall on November 11, 1989. (Photo by Gerard Malie/AFP Photo)