Moving clocks run more slowly than unmoved clocks ('Time dilation'). This also applies to biological clocks, making moving people age more slowly. However, this effect is only noticeable at extremely high velocities, such as 50% of light speed.

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The Grand Design

The laws of nature seem mysteriously crafted to allow for complex life. Scientific explanations involve the existence of multiple universes with different sets of laws. Thus, a universe with our set of laws is no more special than the unique configuration of our solar system or the very planet we live on.

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