President Barack Obama on April 3 unveiled the broad outlines of a scientific initiative aimed at mapping the human brain. When the White House announced the BRAIN Initiative, it employed the use of an artistic collection of images from Harvard researchers. The "Brainbow" project mapped neural mice activity with an array of fluorescent colors to understand how nerve cells interact. The Times contacted Harvard and received permission to use these beautiful pictures from that study. You can read the story on our News Explainer topic page.