A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A detail of 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A detail of a 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN

A 25.2 metre (83-foot) blue whale skeleton is pictured suspended from the ceiling after being unveiled at the Natural History Museum in London on July 13, 2017. "Hope" the blue whale takes over from "Dippy" the dinosaur as the centrepiece of the revamped atrium of London's Natural History Museum despite a spirited campaign to keep the much-loved attraction. / AFP / Tolga AKMEN