Watch NASA's Mars helicopter unfold like a butterfly (video)<br/><a href="https://www.space.com/mars-helicopter-unfolds-legs-perseverance-rover-video" rel="noreferrer noopener" target="_blank">space.com</a>Read further by <a href=https://www.space.com/mars-helicopter-unfolds-legs-perseverance-rover-video>Clicking Here</a>