Sites such as Ancestry.com offer to compare your DNA to those they already have on record in hopes of connecting you to unknown branches of your family tree . James Watson and Francis Crick discovered the double helix in 1953 . In 2003 , scientists completed the Human Genome Project . The project was a collaboration between researchers from around the world to sequence all of our DNA ( which is made up of two strands ) into one big long string that can be read by computers.
James Watson and Francis Crick discovered the double helix in 1953 . In 2003 , scientists completed the Human Genome Project . The project was a collaboration between researchers from around the world to sequence all of our DNA ( which is made up of two strands ) into one big long string that can be read by computers.