The Smithsonian Institution’s National Museum of Natural History is again the place to go for online information on human evolution and Homo sapiens: http://humanorigins.si.edu/evidence/human-fossils/species/homo-sapiens
The Smithsonian Institution also hosts a wonderful website on the Neandertals at http://humanorigins.si.edu/evidence/human-fossils/species/homo-neanderthalensis
The Bradshaw Foundation website provides detailed information on numerous species of the Genus Homo, including images of fossil skulls and stone tools: http://www.bradshawfoundation.com/origins/index.php
You can check out the Neanderthal Museum in Germany at http://www.neanderthal.de/en/.
Neandertal remains popular with the public and a frequent subject of movies and documentary films. The Public Broadcasting Service (PBS) and NOVA feature many fascinating films on Neandertals, including:
- Neanderthals on Trial: http://www.pbs.org/wgbh/nova/neanderthals/
- Decoding Neandertals: https://www.pbs.org/video/nova-decoding-neanderthals/extras/
- The Last Neandertals: https://www.pbs.org/video/last-neanderthals-kd3tn8/;
- Neandertal: https://www.pbs.org/program/neanderthal/
The UNESCO World Heritage Centre has information on the Site of Atapuerca at http://whc.unesco.org/en/list/989
ThoughtCo. has a useful Neandertal study guide at: https://www.thoughtco.com/neanderthals-study-guide-171212