What is phosphene? a. Seeing bright lights and stars when you rub your eyes b. the scientific name for native bird saliva c. a strong chemical which removes bath mould d. a flavouring in ice-cream
How many times does the average human’s heart beat a day?
Which one do we know more about; the surface of the moon or the bottom of the ocean?
How many lenses do dragonflies have in each eye? a. 3 b. 3,000 c. 300,000
What is Australia’s largest butterfly?
A. Phosphene occurs when light seems to appear in your eyes without light actually entering your eyes. This often happens if you rub your eyes when you are tired and it seems like you see stars, even though no light has entered your eyes.
The average human heart beats at 70 beats per minute. There are 1440 minutes in a day (60 minutes per hour x 24 hours), so the average heart beats over 100,000 times a day (1440 minutes in a day x 70 beats per minute).
We know more about the surface of the moon than we do about the bottom of the ocean. We have only explored a very small amount of our ocean floor as there is so much of it; it is much easier to study the moon when we go there as it doesn’t have any living creatures or plants to study. Strangely enough, it is easier for us to visit the moon than it is for us to reach the very bottom depths of the ocean due to the high pressure deep down in the oceans.
Dragonflies have two eyes like most humans, but they have 30,000 lenses in each eye, humans only have one.
Australia’s largest butterfly is the bright yellow and green Cairns Birdwing butterfly (Ornithoptera euphorion) with a wingspan of up to 18 cm. CSIRO researchers have a collection of over 12 million insects in the Australian National Insect Collection (ANIC) including the Cairns Birdwing which they maintain and use for their research. Visit theAustralian National Insect Collection for more information.