Can you really count the seconds between lightening and thunder to determine how far away it is?

This entry is in the series Deep Questions

I’ve always heard the wives tell that you count the seconds between seeing a lightening flash and the sound of the thunder to figure out how far away it is. Living here in Florida, we get lots of both. So is it true or an old wives tale?

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Do earlobes have a purpose?

This entry is 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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