Performers Roni, Liv and Becky behind the scenes at Great Yarmouth Hippodrome Circus, England. (Photo by Nick Warner/The Guardian)

An incredible clear-air lightning display from storms to the east of Noonamah, just outside Darwin on April 6, 2015. (Photo by Jacci Ingham/The Guardian)

Stefania and Mariah play with a hose in South Norwood, United Kingdom on June 1, 2021. (Photo by Joe Plimmer/The Guardian)

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)

Young siblings in costume fully embrace the Notting Hill carnival atmosphere in London, England on August 28, 2023. (Photo by Nico Froehlich/The Guardian)

A moment of intimacy at the Sydney Cherry Blossom festival in Auburn Botanic Gardens on August 19, 2024. (Photo by Mike Bowers/The Guardian)

“Unexpected humour”. The Dog and the Faucet, in Kolkata, India on January 2017. (Photo by Pau Buscató/The Guardian)

Teeming with images of spectacular underwater scenes from around the world, Call of the Blue is the culmination of a five-year project by the photographer and ocean conservationist Philip Hamilton. This groundbreaking book includes contributions from acclaimed scientists and ocean “guardians”, who reveal what drove them to answer the call of the blue. (Photo by Philip Hamilton/The Guardian)