Weaning Your Baby Onto Solids. The term 'to wean' comes from an ancient phrase that means 'to accustom to'. So weaning refers to the period during which an infant gradually becomes accustomed to food other than milk (breast or formula). Up until 6 months of age, breast or formula milk alone is nutritionally adequate.
Occasional airplane vibration during flight is not unusual. There are many causes of airplane vibration, including landing gear extension and retraction, extension of speed brakes, free play in movable surfaces, and systems malfunctions.
The Pilots Are Ready For It. Airplane pilots usually know when turbulence is coming thanks to weather reports and a game of telephone played at 30,000 feet. When pilots hit choppy air, they alert air traffic control, as well as the pilots guiding other planes along the same flight path.