Arab–Byzantine wars were a series of wars between the mostly Arab Muslims and the East Roman or Byzantine Empire between the 7th and 11th centuries AD, started during the initial Muslim conquests under the expansionist Rashidun and Umayyad caliphs in the 7th century and continued by their successors until the mid-11th century.
Top Ten Earthquakes and Volcanic Eruptions<span> ... A detailed reference is "The </span>historical earthquakes<span> of Syria: an analysis of large and ... </span>Some<span> authors suggest the accounts may refer to a typhoon rather than an </span>earthquake<span>.</span>
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Our best estimate for the age of the universe is based on what we currently know about the universe's history is 13.772 billion years.
<h3>How to calculate the age of the universe?</h3>
There are two methods by which the scientists calculate the age of the universe:
By searching for the oldest stars
By calculating the rate of expansion of the universe and generalizing back to the Big Bang Theory.
Thus, Our best estimate for the age of the universe is 13.772 billion years.
Learn more about the age of the universe
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