Answer:Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.
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Smiling .. just makes people happier because smiling is a happy thin so u can start thinking happy and then it makes you happier ?? Idk that’s a guess
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In the statement "Critical thinking requires reasoned judgments," the word reasoned means logical and well thought out.
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What do u wanna say? I didn't understand