# The First Stars and Galaxies July 08, 2014 - [ News ](/news-categories/news) Video: Harvard Prof. Avi Loeb on structure formation in the early Universe, mapping hydrogen using 21 centimeter line, and density inhomogeneities. Video: See also:- [ Faculty ](/announcements/faculty) - [ News Media ](/filter_by/news-media) - [ 2014 ](/news-date/2014) - [ July ](/news-date/july-0) Share on:- [ Facebook ](#) - [ Twitter ](#) - [ Linkedin ](#)