Knowing the Unknowable. Double space, in roman letter in font 12. Please use proper English.
Also, can you please provide the reference used on a reference page and please cite on which paragraph the information and or idea was used within the document?
Instructions are as followed: "Dark matter and dark energy are two of the biggest mysteries in science today.
Although we don't know what they are, scientists would not have added them to our models of the universe without strong evidence that they represent real phenomena (see the Hallmarks of Science).
In a 3 paragraph essay, identify one piece of evidence for the existence of either dark matter or dark energy, and describe it in detail. Explain why the observations you have chosen are scientifically convincing evidence for the existence of dark matter or dark energy."