Millions of years from now, the land that makes up North America may be scattered across the glove

It would be really cool to have lived when all the land on Earth was together as one giant continent

Given enough time, Uranium 238 will become Lead-206

Slowly but surely, the rocks on Earth are constantly splitting apart into different land masses

It's amazing to think of the many physical differences that exist within the human race

The longest amount of time on the Geologic time scale lasted over 3.8 billion years

It must really hurt for animals to fall if they do not have a backbone

I've got a backbone so I can take a hard fall.

It's sad to think of how there are times when many species of animals all die at once.

Wow! It must be really cool to be an animal that can live in water or on land.

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