/oss/taxonomy/term/1021/all en /oss/article/did-you-know-general-science/pangolins-use-rocks-lieu-teeth <p><span>Pangolins, or scaly anteaters, are amazing little mammals. There are eight species of them, and they are the only living creatures in their order of Pholidota. Spread throughout Asia and Africa, they can be as small as 2 kg or as large at 35 kg. But if you meet one, you will probably be struck by their scales. </span></p> Thu, 31 May 2018 18:20:00 +0000 Ada McVean B.Sc. 7120 at /oss /oss/article/you-asked/rock-tumbler-safety <p><strong>My son is taking chemistry in school and he tells me he's grinding rocks but I've yet to see any rocks. Does this possess a danger?</strong> </p> <p>This should be a harmless activity in that all that is happening is an automatic way to grind down minerals that often result in polished and sometime quite beautiful stones.  Be clear that some tumblers are "on" for weeks in order to polish the stones so electricity costs are a mild consideration.</p> Tue, 21 May 2013 15:30:48 +0000 David Harpp PhD 1940 at /oss