He estimated how many species of insects lived on each plant species in England, and then extrapolated that figure across the whole planet. âIf we say 400,000, we shall, perhaps, not be very wide of the truth,â he wrote. Today, scientists know the Westwood figure is far too low.
Symptoms: A chronic dry cough that's worse at night, disturbing sleep, and sometimes with wheezing and shortness of breath. Causes: An irritating night cough is often the first sign of asthma, especially in children, but you can develop it at any age. It's also a sign asthma is worsening or not being well controlled.
CAUSES OF DRY MOUTH AT NIGHT. Mouth-breathing is the primary culprit of producing a dry mouth at night. Breathing through your mouth is commonly triggered by the following: Use of bite splint, dental retainers, or other orthodontic appliances. Wearing a CPAP mask as part of treatment for sleep apnea. Snoring due to an allergy or cold can cause tissue in the nose to swell, so youâre more likely to breathe through your mouth at night. Breathing difficulties â blocked nasal passage due to chronic sinusitis, maxillary antrolith, or a deviated nasal septum.