01
Nov
On the sunny side of the street: Swetha Sivakumar decodes SPF
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By
sentechzone
Isn’t it strange that we’ve had mass-produced sunscreen for less than a century, though we’ve been wandering about outdo...
Tag Archives: Sivakumar
17
Oct
Foam improvement: Swetha Sivakumar on the history of toothpaste
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By
sentechzone
The quest for minty-fresh breath goes back at least 5,000 years. PREMIUM The Dentist (1629), a satirical painting...