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.
Nighttime dry coughs can be particularly miserable. There are various reasons why a chronic or persistently dry cough can occur only night time. Dry coughing at night in some cases may occur due to exposure to respiratory irritants like cigarette smoke and indoor chemicals or due to underlying allergies.sing steam cautiously â Cough at night can become worse if your airways become dry. Before going to bed, if you take a bath or shower, or even just sit in a steamy bathroom, it can certainly feel relieving.