Radiation for example, is invisible, has no smell or odor, while it is extremely deadly for the humans.

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While many animals communicate using their sense of smell, it has long been assumed that humans lack this ability because we do not have the olfactory sensitivity of dogs for example.

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But anyone who has tried blending ice to make a smoothie will tell you that the process is loud, takes a while and usually leaves your blender emanating a strange burning smell.

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Summer is filled with distractions and trying to keep your focus on big initiatives while everyone else is off frolicking or when you can smell the newly-mown grass outside your living room window as you drill yourself on logic games is a formidable task.

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While associations are known to form based on sight, smell, and other senses -- you may remember last year's baseball game through the taste of a hot dog today, for example -- their computer model shows that the young brain cells also link through time.

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But while it might not be toxic - it doesn't half smell.

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The stench from overflowing toilets and drainpipes made some cabins uninhabitable and many people slept in corridors, while others took bedding out into the open to escape the heat and foul smell.

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