Posts Tagged ‘QOTW’

When I was younger, I always wondered this.  The sun is phenomenally powerful in providing heat and light.  The earth is very far away from this star and yet we are lit up perfectly in the daytime.  Surely space should be an even hotter and brighter place with it being closer to the sun?  When I took physics A level, I finally learned the answer.  We can only see light when it bounces off an object and enters our eye.  There are no objects in space, it is a vacuum.  Therefore, when light from the sun passes through to us, it hits nothing, meaning we see no rays.  When the light rays meet Earth, light is reflected off the many objects and surfaces, allowing us to see.  Good times!  (Oh and as for heat, the closer you get to the mighty sun, the hotter it gets).

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…Well…Do they?  I saw a spider run across my lounge earlier.  After jumping on the sofa, whimpering and maybe a scream, I scooped it up in a cup and put it outside.  I do not like killing anything as I feel it is cruel.  An insect should not have to die merely because it is an inconvenience.  I wondered if insects have feelings as we do and if they have hearts.  I googled this question and found that in fact, they do!

Their hearts are very unlike ours, though.  It is more of a tube that runs from one end of their body to the other.  From head to tail, it pumps blood around.  Also unlike us, they do not have blood vessels.  Blood in an insect flows between all spaces in a continuous, circular motion.  The human body is immensely more complicated than that of a smaller being and so these differences explain themselves.

And there you have it.  The question you all wanted to know the answer to ;-).  With thanks to http://whyzz.com

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