DID YOU KNOW?
...that your fingernails grow at the rate of about one nanometer per second? A nanometer (nm) is one-billionth of a meter—about the width of an average molecule. For comparison, a human DNA molecule is about 2.5 nanometers wide, while a strand of human hair can be 50-100,000 nm in diameter.
I did, because I'm a member of the SF Exploratorium!
Summer vacation is upon us, and for school-aged mothers, that means more kid stuff, more of the time. But I'll be writing more Quakerly stuff very soon. Thanks for your patience.
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