Why do we use one hand more than the other? (Thinkstock)
Why do we use one hand more than the other?

You asked us a question. Why do we use one hand more than the other? By the age of 2 or 3, most of us have started to prefer using one hand. It is typically the right hand. 

Only about 10 percent of us end up as lefties. If you are a lefty, you've probably been called a southpaw. They are basically all of the evil, witchy, criminal-type people out there. Just kidding! I'm just trying to mess with you. We don't believe in that crazy talk anymore.

But why do we develop into righties and lefties? That question has more than a few scientists scratching their heads. Scratching with their dominant hand of course! (It's going to get worse.)

Handedness in humans probably goes way back. It goes back perhaps as far as our Neanderthal ancestors. It could have been even earlier. Some researchers suggest the trait evolved as our tools became more sophisticated.
But why the right hand came to dominate the left is anybody's guess. We do know that genetics plays a role in handedness. It's possible hundreds of genes are involved.
But, a person's environment is important, too. Just ask your grandma.
In the past, lefties often had to learn how to write with their favored hand tied behind their back. And even today, we basically live in a right-handed world. That forces many a lefty's hand when it comes to using scissors and writing at a desk. Or even when they are zipping up a jacket.

Until, that is, you get a lefty into the boxing ring or at home plate. That's when an element of surprise gives them the upper hand.

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Why are some people left-handed?
Write your answers in the comments section below

  • zoet-
    5/04/2016 - 11:04 a.m.

    I think some people are right handed or left handed because, when baby's start to use there hands, they use the hand that is more comfortable for them.

    • joscelynb-
      5/04/2016 - 11:21 a.m.

      that is what I would say they just use there favert hand.

  • bryceb-
    5/04/2016 - 11:05 a.m.

    probably there environment

  • jacksons-
    5/04/2016 - 11:06 a.m.

    wow I thought that there were a lot more left handies in the world, but only 10 present of the population is left handed

  • miked-
    5/04/2016 - 11:08 a.m.

    Because they use their left hand to do more stuff than their right hand.

  • adelinab-
    5/04/2016 - 11:11 a.m.

    Some people are left-handed because of genetics.

  • brandonb-
    5/04/2016 - 11:11 a.m.

    are left handed people born left handed or develop it?

  • noahf-
    5/04/2016 - 11:13 a.m.

    I am confused.

  • simons-
    5/04/2016 - 11:16 a.m.

    I am glad I'm not left handed because left handed materials are more expensive.

  • kadew-
    5/04/2016 - 11:16 a.m.


  • kadew-
    5/04/2016 - 11:17 a.m.

    And environment

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