Toothed whale brain size with the expected brain size based on such allometric analysis provides an encephalisation quotient that can be used as another indication of animal intelligence. Sperm whales have the largest brain mass of any animal on earth, averaging and in mature males, in comparison to the average human brain which averages in mature males. The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. Dolphins are known to engage in complex play behaviour, which includes such things as producing stable underwater toroidal air-core vortex rings or "bubble rings". Two main
James Whale (radio) 2018, Whale announced that Maxted had been diagnosed with stage four lung cancer. She died on 12 May 2018. In February 2000, Whale was diagnosed with kidney cancer. He had not experienced any symptoms until he noticed blood in his urine, caused by a large tumour on his left kidney. He underwent an operation from which he had a 50% chance of survival, and chose not to have chemotherapy afterward. In 2006, he launched the James Whale Fund for Kidney Cancer to fund research and raise awareness of the disease. The fund became Kidney Cancer UK in 2016. Whale has