If you are struck by lightning, your skin will be heated to 28,000 degrees Centigrade, hotter than the surface of the Sun.
If you trace your family tree back 25 generations, you will have 33,554,432 direct ancestors – assuming no incest was involved.
The average distance between the stars in the sky is 20 million miles.
It would take a modern spaceship 70,000 years to get to the nearest star to earth.
An asteroid wiped out every single dinosaur in the world, but not a single species of toad or salamander was affected. No one knows why, nor why the crocodiles and tortoises survived.
If you dug a well to the centre of the Earth, and dropped a brick in it, it would take 45 minutes to get to the bottom – 4,000 miles down.
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