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What I think was the best science discovery is DNA because without DNA we wouldn't know the things we know today about what type of blood we have and what does it help us know. DNA has been around for centuries and has helped scientist find answers to their questions as well as to help them do lots or research on DNA. 

As we know that DNA is used for many things such as tell which blood type of blood we have, and can tell who's DNA you have. This is very useful because a scientist named Rosalind Franklin and four other scientist helped discover the process of the double helix. This is what I think was a great discovery in science. 



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