Amazing discoveries!

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Across
  1. 2. Discovered by Marie and Pierre Curie in 1898. Atomic number 88
  2. 3. Discovered accidently by John Walker. Made of antimony sulfide, postassium chlorate, and gum arabic coated on a cardboard strip
  3. 5. Contrary to belief, was not actually invented by Romy and Michelle but instead Spencer Silver
  4. 6. Founded on February 28th 2011 Phil and Alan Swift invented this product because of a need for an easy to use portable home improvement product
  5. 8. Kimberly Clark developed a crepe paper used as a filter within gas masks during World War 1
  6. 9. Thought of have originated from China and made its way to Spain through Italy. Hollow effigy of a farm animal filled with seeds
  7. 10. Fairy Floss. Created by William Morrison, a dentist, in 1897 with the help of John C. Wharton. Common treat at the circus
Down
  1. 1. Issued in in France 1893. Massachusetts was the first state in America to issue one and the rest of the states to follow in 1918.
  2. 4. Character created by Alan Livingston in Los Angeles, 1946. Nations longest running children's television program
  3. 7. Came about during 1st century AD from Roman Egypt by Hero of Alexandria. First use was to dispense holy water