churn in Business English. churnnoun [ U ] Preventing customer churn is a major concern for mobile service providers, since 20-40% of customers leave their providers in a given year. Employee churn for new hires increased by 33% for the third straight year.
For 18 months, the baby nurses while its mother is on land, or it swims underwater to suckle. When it dives, the calf closes its nose and ears to block out water. All hippos have this ability. They also have membranes that cover and protect their eyes while they are underwater.
In 2014, the Curvier beaked whale broke the record for the mammal that could hold its breath underwater the longest.The longest dive was recorded at 2 hours and 17 minutes. It was previously thought that elephant seals could hold their breath the longest, with a record of 2 hours. Although they arenât mammals, sea turtles hold the record for the animal that can hold its breath the longest underwater. When resting, sea turtles can stay underwater for days. On average, sea turtles can hold their breath for 4 â 7 hours. Green sea turtles can hold their breath for as long as five hours, whereas Loggerhead sea turtles hold the record for the longest documented dive, remaining underwater for longer than 10 hours. How do humans compare? Compared to these amazing aquatic mammals, humans still have a long way to go.