Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Your thumb is about the same size as your nose.
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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16