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Land before time (clocks)

Across
Animals living 72 million years ago
Brazil tribe
Bright Orb in the sky
1/2 a billion years
Study of layers of rocks
Mechanical measurement of time
Orb in the sky at night
The landmass forming the 7 continents
Lived 1.2 billion years ago
An age between 3750 & 3000 BCE
Down
Used for navigation
A supspecies of Homo sapiens
An age that lasted 3 million years (4500-2000 BCE
Period 199.6 million years ago
Measurement of seasons
Age ending around 400 CE
50,000 years ago when humans began using tools
a period of time equal to 1/24th of a day
The current era starting 66 million years ago