Do earlobes have a purpose?

This entry is part 30 of 40 in the series Deep Questions

The external ear itself has the valuable function of collecting and directing sound into the inner ear. The parts of the ear you can see without a doctor’s help are called the pinna; those curvy bits conduct sound vibrations in the air down into the tympanic cavity. The shape of the pinna helps your ear and brain figure out what direction sound is coming from. But the lobule — the part hanging down — isn’t any help. In fact, some people are born lobeless because of recessive genes, and this doesn’t seem to affect their hearing.

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I'm Baaaaaccckk!

And I actually have been away. Of course being away no longer means leaving your web access behind, but work and work related travel has just been a bear the past few weeks. Lots of things due on short time schedules, and I’ve been traveling as well. Atlanta, Chicago, Minneapolis, then Chicago again Monday after being told Friday to be there, and that precluded a trip to Boston.

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Is there such a thing as a Second World Country

This entry is part 32 of 40 in the series Deep Questions

Third World countries (now known as “developing nations”) are countries with a low “Human Development Index.” First World countries (like the United States, Japan, and Germany) score much higher on the HDI. A nation’s HDI is determined by its literacy rate, poverty rate, life expectancy, etc. There is indeed a Second World, though the expression isn’t exactly parallel to the other terms, and these days, few mention it.

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