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tip: Astronomy A 19 Jun 2019 15:41 (rev. 1) mvishnu
Added tags: science.
tip: Astronomy N 19 Jun 2019 15:41 (new) mvishnu
Do You Know? S 19 Jun 2019 15:35 (rev. 97) mvishnu
tip: Pingala, the inventor of Binary Numbers A 19 Jun 2019 15:25 (rev. 1) mvishnu
Added tags: mathematics.
tip: Diamond Mining A 19 Jun 2019 15:14 (rev. 1) mvishnu
Added tags: engineering.
tip: Diamond Mining N 19 Jun 2019 15:13 (new) mvishnu
Do You Know? S 19 Jun 2019 15:09 (rev. 96) mvishnu
tip: Use of Wool, Cotton, Plant for Clothing F 19 Jun 2019 15:02 (rev. 3) mvishnu
Uploaded file "cotton-example-2.gif".
tip: Water-Flushed Toilet System S 19 Jun 2019 14:50 (rev. 5) mvishnu
tip: Ruler S 19 Jun 2019 14:49 (rev. 2) mvishnu
tip: Buttons S 19 Jun 2019 14:47 (rev. 3) mvishnu
tip: Buttons F 19 Jun 2019 14:45 (rev. 2) mvishnu
Uploaded file "button-Indus-valley-civilization.jpg".
tip: Buttons A 19 Jun 2019 14:43 (rev. 1) mvishnu
Added tags: engineering.
tip: Buttons N 19 Jun 2019 14:43 (new) mvishnu
tip: Use of Wool, Cotton, Plant for Clothing A 19 Jun 2019 14:38 (rev. 1) mvishnu
Added tags: engineering.
tip: Ruler A 19 Jun 2019 14:31 (rev. 1) mvishnu
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