Known and unknown Science Facts

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Across
  1. 4. First scientist awarded with two noble prizes
  2. 6. where is the largest particle accelerator located
  3. 7. Youngest country in the world
  4. 9. Hardest natural substance
  5. 10. how many seconds did an individual blood cell takes to make a complete circuit of the body.
  6. 13. Most earthquake country
  7. 17. More islands than any other countries
  8. 18. World largest amphibian
  9. 19. where is the oldest living tree located
Down
  1. 1. Which animal have 3 hearts
  2. 2. where is the world largest bridge located
  3. 3. Home video games developed first
  4. 5. Hottest planet in our solar system
  5. 8. male species give birth to young one
  6. 9. Oldest profession in the world
  7. 11. breath through their butts
  8. 12. Capable to express over 100 vocal sounds
  9. 14. how many countries competed in 2018 winter olympics
  10. 15. strongest natural material
  11. 16. brightest object in the sky