Roxy, a Red Labradoodle, Jaku, a Black and Tan Lurcher, Kobe, a White German Shepherd, Rocky, a Black and Tan German Shepherd, and Busy, an English Springer Spaniel Cross, queue outside an Aldi store in Hinckley, Leicestershire, UK on Monday, December 1, 2025. (Phoot by Lucy Ray/PA Media Assignments)

Divers swim beside millions of silverside fish at Devil's Grotto, Cayman Islands. Swimming in unison, millions of silverside fish dwarf the divers. The fish create waves of silver light as they move around the grottos that lie beneath the surface of the Caribbean Sea. These amazing photographs were captured by Belgian photographer Ellen Cuylaerts, 44, on a diving trip to the Devil's Grotto, Cayman Islands. (Photo by Ellen Cuylaerts/This is Guavo Media)

Backdropped by a night time view of the Earth and the starry sky, the Space Shuttle Endeavour is seen docked to the International Space Station on May 28, 2011. (Photo by Reuters/NASA)

An octopus is filmed by the National Oceanic and Atmospheric Administration ship Okeanos Explorer and its robotic sub. (Photo by National Oceanic and Atmospheric Administration)

“Cyber Monsoon”, honorable mention in Places category. A torrential monsoon rain in Bhaktapur, Nepal. (© Anuar Patjane)

This is the Legends Russian Series. Legends car exceeds new Porsche 911 power-to-weight ratio – it is 260 hp per ton with the car weight of 500 kg. It’s been designed in the USA by 600 Racing Inc, a subsidiary of Speedway Motorsport, the largest motorsport holding company in America with the annual turnover of $567,000,000. Khimki, Moscow region. February 11, 2012. (Photo by Alexey Petrov)

Lake Baikal is the world's oldest lake, at 25 million years (possibly older), and deepest, averaging 744.4 metres (2,442 ft).

Located in the south of the Russian region of Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, it is the most voluminous freshwater lake in the world, containing roughly 20% of the world's unfrozen surface fresh water.