This is a picture of the structure of part of a DNA double helix. It was made by and posted on Wikipedia by Brian0918™ and is in the Public Domain.
Today many folks are really into DNA testing to find out as much as they can about their ancestors.
Today's link is to an article which has some surprising information for those searching for their ancestors
and even for those who aren't.
Either way you will find this article and the accompanying video very interesting.
Check this out.
HERE'S THE LINK to Human Genetics Are we really different