Adult fleas live off the blood of animals and are very difficult to kill. They have hard bodies that make them difficult to 'squish'. Fleas can jump distances of up to 1 metre (3.2 feet). A female flea can lay between 20-30 eggs in one day and she can continue laying that many eggs for between 6 and 9 months. If she lives for 9 months she'll have produced 8,000 eggs. If half of these fleas are females and start laying eggs, this will result in about 500 eggs per day being laid or 15,000 eggs per month!
The soft footfall that signals dinner
The soft footfall that signals dinner A German physicist has developed a computer model
that explains how scorpions can locate prey by listening to ripples
in the sand. Scorpions detect movement on sand with sensors in
their feet and feel the vibration most strongly in the direction of
the prey. This tells them where to turn to face their prey. It is
possible that a similar process tells spiders where prey is in
their webs. 3 APRIL 1999, P. 6
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