Random Human Facts

    96 facts tagged with Human Facts

    After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
    139
    Yawns are more contagious among people with closer relationships.
    163
    Enamel is hardest substance in the human body.
    61
    Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
    197
    The average person's skin weighs twice as much as their brain.
    131