CONNECTED TO THE VATICAN. I THINK THAT THE SKI DISC IS A REALLY VALUABLE TOOL BECAUSE IT’S SO EASY FOR PEOPLE TO UNDERSTAND THIS TEN INCH WHITE PLATE HAS A SIMPLE DESIGN. KNOWN GLOBALLY AS THE SKI ...
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A simple 19 th Century tool is still useful to ocean scientists in the age of satellites, new research shows. A Secchi disk – historically called a “dinner plate” by sailors – is used in the open ...
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