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Speed: did you knows

  1. The fastest fish in the sea is the swordfish and can reach up to speeds of 108kph (68mph, 59knots) 
  2. A whip makes a cracking sound because its tip moves faster than the speed of sound 
  3. Sound travels 10 times faster through granite than air 
  4. A dragonfly can fly at 40kph (25mph) 
  5. Flies can react to an object it sees and change direction in less than 30 milliseconds 
  6. The fastest insect is the Australian dragon fly (its top speed is 57 km/h (35mp/h)) 
  7. Warthogs can reach speeds of 48km/h (29mph) 
  8. A woodpecker can peck 20 times a second 
  9. Fingernails grow faster than toenails 
  10. Tachophobia is the fear of speed 
  11. If you could drive to the sun at a speed of 88.5 km/h (55 mp/h) it would take around 193 years 
  12. Cheetahs can accelerate from 0 to 70 km/h (43mp/h) in 3 seconds 
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