Exponentiation by squaring

Children play in a large mirrored object at the Science Museum in London, UK, on its official re-opening day. Photo: Dan Kitwood/Getty Images.

😊

A sunflower head with a smiley face carved out of its seeds in a field in Dunham Massey, Britain. Photo: Phil Noble/Reuters.

Recruiting Volunteers

A seagull carries a protective face mask at the port of Dover, Britain. Photo: Peter Nicholls/Reuters.

High Tea

Deer clash as they fight during the rutting season in Richmond Park in London, United Kingdom. Photo: Toby Melville/Reuters.

Single but not alone

Greedy squirrel in St James’s Park, City of Westminster, central London, United Kingdom. Photo: Jeremy Selwyn.

Water Earth Fire Air

A girl stands among the cooling jets of a fountain during a heatwave in London, United Kingdom. Photo: Andrew Winning/Reuters.

Theoretical draw

Love Always Wins, painted on the side of The Winchester in Angel, London, England by street artist Pegasus, honours LGBT Pride Month and the 50th anniversary of the Stonewall Riots. Photo: Pegasus (@pegasusart).

Tempered Steel

Scunthorpe, England: A cat sits outside traditional steel workers cottages in the town where British Steel employs 5,000 people. The company has been forced into liquidation and not only are those jobs at risk, but also the 20,000 dependant jobs in the local area and supply chain. Photo: Christopher Furlong/Getty Images.

Extraterrestrials

Protesters on the fifth day of demonstrations for climate change hold their hands glued together at Oxford Circus in London, United Kingdom. Photo: Frank Augstein/AP.

Searching for Rascal

The National Paw-trait Gallery, a pop-up art gallery dedicated to extraordinary dogs is opening today at the Protein Studios in Shoreditch, East London, United Kingdom. Photo: Nigel Howard.

Lost in Translation

Miniature dolls heads on display at the City of London Dollshouse Festival at the Tower Hotel in London, United Kingdom. The festival showcases the top craftsmen and craft suppliers specialising in all areas of miniatures and model-making. Photo: Vickie Flores/Alamy Live News.

Jumping the Queue

A group of Polish tourists have fun by trying to see how many of them can fit into a red telephone box, in Westminster, London, United Kingdom. Photo: PA.

Another Winter, Another Spring

Deer in Richmond Park, south west London, United Kingom as the cold weather continues. Photo: PA.

The Pigeon-Pye

A pigeon sits atop a sculpture of Edith Cavell, by the artist George Frampton, in central London, United Kingdom. Photo: AFP/Adrian Dennis.

The Santa Claus Apprentice

London, United Kingdom: Larry, the Chief Mouser to the Cabinet Office, relaxes under the Downing Street Christmas tree. Photo: Henry Nicholls/Reuters.

Night Lights

Light displays are pictured during a photocall at Kew Gardens in southwest London, United Kingdom. Photo: AFP/Tolga Akmen.

In vino veritas

A rare 明 (Míng)-style moon-flask, with a 雍正帝 (Yōngzhèng) six-character seal, circa 1725-35, is displayed at Christie’s auction house, London, United Kingdom. Photo: Guy Bell/Rex/Shutterstock.

One Autumn Night

Meerkats and lemurs getting ready for Halloween with pumpkins, as the run up to a busy weekend of pumpkin carving and pumpkin activity at Flamingo Land in Malton, North Yorkshire, United Kingdom. Photo: Charlotte Graham/Rex/Shutterstock.

It Is Never Too Late to Be What You Might Have Been

Mayor of London Sadiq Khan (centre left) amid a crowd of almost 700,000 people peacefully marching on parliament to demand “people’s vote” on Brexit deal on Saturday, October 20, 2018 in London, United Kingdom. It was the biggest outpouring of public opposition to government policy since the anti-Iraq war protest in 2003. Photo: Mayor of London (@MayorofLondon).

Nessie

A giant inflatable sculpture of E. coli (Escherichia coli) by Luke Jerram is installed at the Oxford University Museum of Natural History in Oxford, United Kingdom as the showpiece of its new exhibition on bacteria. Photo: Tracey Jones/PA.