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 Cough in Toddlers: If your child sleeps well through the night and has no difficulty in breathing, then there is no cause for alarm. When your toddler has a dry cough at night, coughs up phlegm, has difficulty breathing, or the cough has lasted for more than ten days, you may have to consult a doctor.inger root is one of the best home remedy to treat dry cough at night. Advice your toddlers to put a small piece of ginger in mouth and also advice them to chew it slowly and to swallow the juice. Also, you can add ginger to hot tea and feed it to your child two-three times a day.