There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
The Earth gets heavier each day by tons, as meteoric dust settles on it.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
13
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
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