Recent contributions:

27 Dec 2007

• Wrote the first answer to Can tigers jump
  Tigers  •  27 Dec 2007 23:34
• Made this change to the answer of What is a Dewey decimal number
  Dewey Decimal System | Taxonomy  •  27 Dec 2007 23:32

25 Nov 2007

• Made this change to the answer of How much is a 1969 nickel worth
  Coins and Paper Money  •  25 Nov 2007 03:04
• Made this change to the answer of What is the difference between audio frequency and radio frequency
  Electronics Engineering | Radio  •  25 Nov 2007 02:37