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When fish like this netted cod are exposed to mercury, it accumulates in certain organs, including the lenses of their eyes. Yvette Heimbrand

The lenses of fishes’ eyes record their lifetime exposure to toxic mercury, new research finds

A new study shows that a time stamp can be put on mercury that accumulates in fish eyes, offering a window into their lifetime exposure.
Both children and adults are susceptible to the ear infection known as “swimmer’s ear.” Kay Blaschke/Stock4B-RF via Getty Images

Summer swimming season may be over, but you can still get swimmer’s ear – and you don’t even need to go in the water

Perhaps surprisingly, it’s possible to get swimmer’s ear without a dip in the pool, lake or ocean. Two doctors explain what this painful infection is and how to get rid of it.
Step away from the cotton swabs! Crazytang/iStock via Getty Images Plus

What is earwax?

That brownish/yellowish gunk that comes out on your finger if you scratch deep inside your ear? It actually serves an important purpose in your body.

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