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.
Even the inside of the ear is covered with fur to protect against the cold temperatures. When a bear dives underwater the ear canals close (Brown 1993, p 81). Smell: Polar bears have an excellent sense of smell and can locate seals up to 40 miles away (Brown 1993, p 82).