The eyes always keep the same size, from the moment we are born until we die. The eyes remain the same size, which does not happen with the nose and ears, which change with the passage of time.
The heart is the muscle that works the most. Every day, it creates enough energy to carry a truck about thirty kilometers. In a lifetime, this is equivalent to driving back and forth to the moon.
The brain is 60% fat, but still works hard and can generate up to 25 watts of energy, enough to light a bulb.
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