The average dinosaur lifespan was surprisingly small. The Tyrannosaurus rex, for example, reached full size between 16-22 years old and lived up until 27-33. The largest dinosaurs such as the Brontosaurus and Diplodocus tended to live up to between 39-53 years old, maybe reaching the heights of 70.
Earth is 4.54 billion years old. Using radiometric dating, scientists have discovered that the Earth is 4.54 billion years old (give or take 50 million years). This makes our planet half the age of the Milky Way Galaxy (11-13 billion years old) and around a third of the age of the Universe (10-15 billion years old).
Mercury, not Venus, is the closest planet to Earth on average. On average, Mercury is 1.04 astronomical units (AU) away from Earth compared to the 1.14 AU average distance between Earth and Venus. One AU is equal to the average distance between the Earth and the Sun. Venus still comes closest to Earth as part of its orbit around the Sun, however.
Jörg Hengstmann
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Sara Rici
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Sascha Latta
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